Hot tub control panel locked? How to unlock it

To unlock a hot tub control panel, you usually press and hold a specific button or pair of buttons for a few seconds until the lock symbol or message clears. The exact sequence depends on your brand, model and panel type, so the most reliable guide to how to unlock hot tub control panel locks is your owner's manual.

Before you press anything, it helps to work out what kind of lock you are dealing with. A full panel lock, a settings lock and a genuine fault can all look similar at first glance, and each one needs a different response.

What does a locked hot tub control panel actually mean?

A lock is a deliberate feature, not a fault. Manufacturers add it so that children, guests or a heavy cover resting on the panel cannot change settings by accident. Most locks are switched on by someone pressing a button sequence, sometimes without realising it.

Many hot tubs offer two different levels of lock. Knowing which one is active tells you what to look for in the manual and whether anything is actually wrong.

Panel lock (sometimes called spa lock or keypad lock)

A panel lock stops the topside control from responding to most or all button presses. You may not be able to turn on jets, lights or change the temperature. The display usually shows a padlock icon, the word LOCK or a short code to tell you the lock is on.

The spa normally keeps running in the background while a panel lock is on. Heating, filtration and any frost protection continue as they were set, so the water stays looked after even though you cannot change anything.

A panel lock is not the same as switching the spa off. A locked spa stays powered and keeps running. Hot tubs are designed to run continuously, so you do not need to turn yours off at the isolator between uses.

When you do need to power the spa down for maintenance, draining or winterising, switch it off at the isolator rather than relying on the panel or a lock. Check your owner's manual before you drain the spa or do any internal maintenance, because the correct steps vary between models.

Settings lock (often called temperature lock)

A settings lock is lighter. You can usually still run the jets and lights, but you cannot change the set temperature or other programmed settings such as filter cycles. Owners often find this one by accident when the temperature buttons stop working but everything else still responds.

A temperature lock often shows as a small lock symbol beside the temperature reading itself, rather than across the whole display. It is commonly switched on by accident when owners explore the Options menu for the first time, so check there first if the temperature suddenly will not change.

On some older displays, the temperature lock appears under a different label, such as TLOK or temp block. Both of these names mean the same thing as a temperature lock, so follow the temperature lock steps in your manual if you see either one.

This type of lock is useful if you rent out a property or have teenagers at home. It keeps the water at the temperature you chose, which should never be above 40°C (104°F), while still letting people use the spa.

How do you find the unlock sequence for your model?

Unlock sequences are not standard across the industry. Two spas from the same brand can use different button combinations if they were built in different years or fitted with a different panel. That is why guessing is a poor idea and the manual is the right starting point.

1. Find your model name and serial number. These are usually on a label on the cabinet, inside the equipment access door, on the control box or in your original paperwork.
2. Note any brand name printed on the topside panel itself. Many hot tub makers use control systems built by specialist companies such as Balboa or Gecko, and the panel guide may come from that company rather than the hot tub brand.
3. Download the owner's manual from the manufacturer's official website using your model name or serial number, if you no longer have the printed copy.
4. Search the manual for words such as lock, panel lock, keypad lock, settings lock or temperature lock. The unlock steps are normally in the same section as the lock steps.
5. If you cannot find a manual for your model, contact the dealer who sold or serviced the spa, or the manufacturer's customer support, with your serial number ready.

On a Hot Spring spa, the sticker inside the equipment access door usually shows the collection name followed by the model name. The collection name tells you which unlock section below applies to your spa. Typical examples look like this:

• Highlife collection: names such as Highlife Envoy, Highlife Grandee, Highlife Aria or Highlife Vanguard.
• Limelight collection: names such as Limelight Flair, Limelight Pulse or Limelight Bolt.
• Hot Spot collection: names such as Hot Spot Relay, Hot Spot Rhythm or Hot Spot Stride.
• Some stickers show a single model name, such as Solana, without a collection name in front. In that case, use the serial number to confirm the collection and panel type with Hot Spring support or your dealer.

Some Hot Spring model names have been used for more than one generation of spa. Read the year of manufacture or the serial number from the same sticker as well as the name, because the panel type, and therefore the unlock method, can change between generations.

If you cannot open the equipment access door to read the model label, check the top edge of the spa shell near the waterline. Some models carry a smaller model label there, which gives you the information you need to find the right manual.

On some spas, the model number label is on the underside or back of the topside control panel. Look there with a torch if the cabinet label is missing or faded, but do not remove the panel to read it.

Hot Spring, for example, publishes owner's manuals and support information on its official website. Balboa also provides documentation for its control systems through its official site, which helps if your panel carries their name.

Do not try random button combinations to clear a lock. On many control systems, some combinations open service or configuration menus that can change heater settings, temperature units or filter cycles. These changes are easy to make by accident and harder to undo without the manual.

Pressing lots of buttons quickly will not clear a lock either. On some older panels, rapid presses can switch on a second lock on top of the first, which leaves you with two locks to clear and makes it harder to tell which steps to follow.

How to unlock hot tub control panel locks on Hot Spring spas

Hot Spring has used several generations of control panels over the years, from simple button panels to touchscreen and wireless controls. The lock options, and the way you clear them, vary between these generations. A sequence that works on one Hot Spring spa may do nothing on another.

On many Hot Spring button panels, both the panel lock and the temperature lock are set and cleared by pressing and holding a specific pair of buttons for a few seconds. The owner's manual for your model shows exactly which buttons, in what order, and for how long.

The year ranges below are approximate, because panel generations overlap. Match the description to the buttons on your own panel, and confirm the steps in your manual before you start.

Highlife and Limelight spas from about 2010 with physical buttons

On these topside panels, the Options button sits on the left and the Lights button sits to its right on the same row. Finding them first makes the two-button hold easier, because you can place one finger on each before you start.

For these spas, the owner's manual describes clearing the full spa lock with a two-button hold:

1. Check that the padlock icon is showing on the display.
2. Press and hold the Options button and the Lights button at the same time.
3. Keep holding both for about 3 to 4 seconds, until the padlock icon disappears.
4. Release both buttons and press one button, such as Lights, to confirm the panel responds.

If the padlock icon is still showing after a correct Options and Lights hold, the spa may be in a temperature lock or a protection state rather than a full spa lock. Check which situation applies, using the table above and the steps below, before you repeat the same sequence.

On newer Limelight button panels, the temperature lock is cleared by a different route from the full spa lock:

1. Press the Options button.
2. Tap the Temperature icon.
3. Tap the top-left temperature button again to toggle the temperature lock off.
4. Check that the small lock symbol beside the temperature reading has gone.

The Hot Spring Flair belongs to the Limelight range and uses the standard Limelight panel. If you own a Flair, follow the Limelight unlock steps above.

Older button panels (about 1997 to 2009)

Older Hot Spring panels usually have a small number of buttons and indicator lights rather than a full display. A lit indicator or a symbol often shows that a lock is on. If your manual is missing, the serial number on the spa will tell support staff which panel you have and which sequence applies.

These older rocker-button panels were fitted to Hot Spot models from about 1997 to 2009, as well as to Highlife and Limelight spas of that era. If you own a Hot Spot spa built before 2010, use the method in this section rather than the SET button method below.

On many of these older spas, the rocker-style buttons are mounted on the side of the spa rather than on a topside panel. If you cannot see any controls on the top rim, look along the side of the shell for the Light minus and Temp minus buttons.

Each rocker on these panels is one long button that tilts two ways. The Light minus button is the lower half of the Light rocker, the half you press to dim the lights or switch them off. The Temp minus button is the lower half of the Temperature rocker, the half you press to lower the set temperature. To unlock, you press the lower half of both rockers at once.

On older Hot Spring spas with rocker-style buttons, the lock is cleared like this:

1. Find the Light minus button and the Temp minus button on the rocker controls.
2. Press and hold both together.
3. Keep holding for about 4 seconds, until the lock indicator clears.
4. Release both buttons and test a single button to check the panel responds.

If the display or indicators do not change at all after a correct Light minus and Temp minus hold, the most likely cause is a tripped RCD or a loss of power, not a stubborn lock. Check the spa's supply in the consumer unit or spa supply unit before you try the sequence again.

Hot Spot and Solana models with a SET button (about 2010 to 2019)

This method applies to Hot Spot spas from about 2010 onwards. If your Hot Spot spa is older and has rocker buttons instead of a SET button, use the Light minus and Temp minus hold described above.

These panels show each lock as a menu item rather than using a button hold. The lock settings sit inside a TOOLS submenu:

1. Press the SET button repeatedly to step through the menu until the display shows TOOLS, then open the TOOLS submenu as your manual describes.
2. Stop when the display shows SPALK (spa lock) or TLOK (temperature lock), depending on which lock you want to clear.
3. Read the sign after the code. SPALK+ or TLOK+ means the lock is on.
4. Press the temperature down button to change the setting from a plus sign to a minus sign. SPALK- or TLOK- means the lock is off.
5. Stop pressing buttons. After about 2 seconds the panel returns to its normal display with the lock off.

Panels with a settings menu or wireless remote

On newer Hot Spring spas with a menu-driven display or a wireless remote, locks are often controlled through a settings or lock menu rather than a button combination. You select the lock option and turn it off, sometimes after entering a code if one was set.

On touchscreen and wireless panels, the panel lock and temperature lock toggles are usually inside a settings menu. You normally open it by tapping a gear or cog icon, which is often in a bottom corner of the screen.

The wireless touchscreen remote is found on certain Highlife NXT models. To clear the spa lock on one of these remotes:

1. Tap the screen to wake the remote.
2. Open the settings menu by tapping the gear or cog icon.
3. Find the Spa Lock option and switch it off, holding the toggle if a quick tap does not change it.
4. Tap the back arrow to return to the main screen.
5. Check that the padlock icon has gone from the main screen.

If a wireless touchscreen remote has a dark display, tap the screen to wake it before assuming a lock. Many remotes dim or switch off the screen after a short time to save battery.

When you switch off the spa lock in the settings menu, a quick tap on the toggle may not be enough. You may need to hold the toggle for 3 to 4 seconds before it changes from on to off.

On some menu-driven displays, each lock appears in the settings menu as a short abbreviated code. A plus or minus sign, or an on or off marker, shows whether that lock is active. On these displays you usually switch the lock off with the temperature down button, but check your manual for the exact steps.

If a wireless remote stops responding, check it is not simply a battery or range problem before assuming a lock. A remote with a flat battery or one that has lost its connection to the spa can look exactly like a locked panel.

How do other hot tub brands handle panel locks?

Most acrylic hot tubs use a control system from one of a handful of specialist makers. Because of this, the lock feature on your spa may match the instructions for the control system rather than anything branded with the hot tub maker's name.

• Balboa control panels are fitted to many different brands. Many Balboa topside panels offer both a panel lock and a settings or temperature lock, cleared through a button sequence or a lock menu depending on the panel.
• On many Balboa topside panels, the lock is cleared by holding the Temp button (or the Warm or Up button) while pressing the Light button. The display briefly shows UNLK when the lock clears. Confirm the exact sequence in your panel guide, because it varies between Balboa panels.
• Gecko control systems are also widely used. Many Gecko keypads include a keypad lock or settings lock option, described in the keypad guide for your model.
• Premium brands with their own control systems, such as Hot Spring, Caldera or Jacuzzi, publish lock instructions in the model's owner's manual.
• On some Jacuzzi models, the child lock is switched on and off by holding the Mode button for about 5 seconds, and a padlock icon shows while the lock is on. Jacuzzi panels vary between models and years, so confirm this in your model's manual before you try it.
• Caldera spas come from the same parent company as Hot Spring and often use similar panel logic. On a Caldera, the Options and Lights hold is worth trying first, before you check the manual for the exact steps.
• Inflatable hot tubs, such as those made by Bestway or Intex, usually have the controls on the pump unit. Many of these have a dedicated lock button that must be held for a set time before the other buttons respond, and some relock themselves automatically after a short period without use.
• On Bestway inflatable spas, the lock button usually has to be held for about 3 seconds to switch the child lock off. The lock icon on the LED display goes out when the lock has cleared.

That automatic relock catches many inflatable spa owners out. If your buttons stop working a minute or so after you last touched them, check the manual for an automatic lock before you suspect a fault.

On Balboa TP-series panels such as the TP2 and TP7, the timing of the presses matters. A typical sequence looks like this, but check your panel guide first:

1. Press and hold the Temp button (or the Warm or Up button, depending on your panel).
2. Keep holding it, and press the Light button twice, using two slow, deliberate presses rather than a quick double tap.
3. Release the buttons when the display shows UNLK.
4. Press a single button to check the panel now responds.

Is my control panel locked or faulty?

A locked panel and a faulty panel can both refuse to respond, but they behave differently. A locked panel is working normally and simply ignoring certain commands. A faulty panel shows signs that something is not working as designed.

Signs that your panel is most likely locked:

• A padlock icon, the word LOCK or a short lock code is shown on the display.
• Some buttons still work, such as jets or lights, while others do nothing.
• The display looks normal, with the water temperature showing as usual.
• The spa is still heating and filtering on its normal schedule.

Signs that your panel or control system may be faulty:

• The display is completely blank, flickers or shows broken characters.
• No button responds at all, including the correct unlock sequence from your manual.
• An error code or warning message appears, sometimes with beeping.
• There is condensation or water visible behind the display window.
• The panel surface is cracked, swollen or a button feels stuck down.
• The panel unlocks but then locks again or freezes straight away.

If you see a code rather than a lock symbol, look it up in your manual first. Our guide to hot tub error codes and what they usually mean covers the common ones and what they point to.

What if the display is completely dark?

A completely dark display is almost never a lock. A locked panel stays lit so it can show you the lock symbol, so a blank screen usually means the panel has lost power.

Before trying any unlock sequence, check the spa's RCD and its circuit in the consumer unit for a trip. If the RCD trips again as soon as you reset it, leave it off and follow the safety note further down this page.

If the power is on but the display stays blank, listen near the cabinet for the circulation pump. If the pump is running, the spa has power and the topside panel or its cable may be at fault. If everything is silent even though power is confirmed, the likely cause is a wiring or control board problem, which is a job for a technician.

Could it be a protection or standby mode?

Some spas pause jets or heating on purpose, which can feel like a lock. Common reasons include a filter cycle, a high water temperature, a run timer ending or a sensor reading that needs attention. If your jets stop on their own, read why hot tub jets turn off automatically.

A protection state is different from a lock because the spa triggers it itself, not the user. Typically the heater stops and the water starts to cool, while the jets may still run. No padlock is shown. Instead, an indicator flashes or an error message appears on the display.

A clogged or dirty filter that restricts water flow is the most common cause of heater protection and flow errors. Clean the filter, then restart the spa at the isolator. If the same problem returns within a few days, replace the filter.

The filter to remove is the circulation filter. On most spas it sits in the standpipe or skimmer housing, often under a grey cap, and you can reach it by hand without tools.

To clear a flow-related protection state:

1. Switch the spa off at the isolator and leave it off for at least 20 seconds.
2. Remove the circulation filter from its housing.
3. Restore power briefly with the filter out, so water can flow freely through the heater, and check whether the message clears. Do not get in or run the jets while the filter is out.
4. Switch off at the isolator again, then clean or replace the filter.
5. Refit the filter firmly in its housing and restore power.

The opposite also happens. A spa that starts its pump while nobody is touching the panel is usually running a filter cycle or frost protection, not ignoring a lock. Our article on why a hot tub turns on by itself explains these automatic modes.

What should you try if the panel still will not unlock?

If you have the correct sequence from your manual and the lock will not clear, work through these checks in order. Most stubborn locks come down to how the buttons are pressed or a temporary glitch in the control system.

1. Confirm which lock is on. Clearing a panel lock and clearing a settings lock often use different steps, so make sure you are following the right one.
2. Dry your hands and the panel surface. Wet fingers and water droplets can stop touch panels and membrane buttons from registering properly.
3. Press each button firmly in its centre and hold for the full time stated in the manual. Releasing a second too early is a common reason a sequence fails.
4. Check that nothing is resting on the panel, such as the cover, a towel or a drinks tray. Constant pressure on one button can block other inputs.
5. For a wireless remote, replace or charge the battery and stay within about 3 metres (10 feet) of the spa while you test it. If the remote has lost its connection, placing it on its docking cradle at the spa for about a minute can often re-pair it. Otherwise, follow the manual's pairing steps.
6. Restart the spa. Switch it off at the isolator, wait a minute or two, then switch it back on. This clears many temporary control glitches. Our guide on how to turn off a hot tub safely walks through this.
7. Allow about 30 to 60 seconds after power returns for the control system to boot fully, then try the unlock sequence again once the display has fully started up.
8. Once the lock clears, press one button such as jets or lights, or nudge the temperature up or down, to confirm the panel is responding before you close the cover.
9. If none of this works, write down any codes or symbols shown and contact your dealer or manufacturer with your serial number.

Wireless remotes use a short-range signal that walls, distance and other nearby wireless devices can interrupt. If your remote works only some of the time, the problem is more likely the signal than a lock.

On most wireless remotes that take replaceable batteries, the batteries sit behind a cover on the back of the unit. Replace them all with fresh batteries of the same type, then test the remote close to the spa before you look for other causes.

Be aware that a restart may clear a lock on some systems, while on others the lock is stored and returns when power comes back. Your manual will say which applies to your spa.

When you check the consumer unit, look for a breaker or RCD labelled Hot Tub or Spa. It may not be in the main house panel at all. Many installations have a separate spa supply unit near the tub or in a garage, so check there too.

If the spa's RCD has tripped, you can reset it once. Push the switch fully down to off first, then push it firmly back up to on. Do this only once, and do not keep resetting it if it trips again.

Never open the control box, remove equipment covers or touch internal wiring while the spa has power. If the residual current device (RCD) trips repeatedly when you restore power, leave it off and call a qualified technician or electrician rather than resetting it again.

In the UK, hot tub electrical installations must meet BS 7671 and be protected by an RCD. New circuits and changes to existing ones should be carried out by a registered electrician, and in England and Wales this work is notifiable under Part P of the Building Regulations. Other countries have their own rules, so check locally. The charity Electrical Safety First has clear guidance on outdoor electrical safety.

Understanding the main controls once the panel is unlocked

Once the lock has cleared, it helps to know what each main button does, so you do not lock the panel again by mistake. Layouts vary between brands and models, so treat this as a general guide and check your manual for the details.

• Jets: on many spas, each press cycles the pump through low speed, high speed and off.
• Lights: a short press usually switches the lights on and off. On many newer models, holding the button down cycles through the colour modes.
• Temperature up and down: these change the set temperature, unless a temperature lock is on.
• Options or cog icon: this opens the settings menu, which controls the spa lock, the temperature lock, filter cycles and display settings.

Each press of the temperature up or down button usually changes the set temperature by one small step, typically 0.5°C, or 1°F if the display is set to Fahrenheit. The spa then heats towards the new set point automatically, so you do not need to keep pressing while the water warms.

If a lock keeps reappearing, the Options or settings menu is the place to check. A lock that comes back on its own may be set to switch on automatically, or someone may be opening that menu and changing it without realising.

When should you call a hot tub technician?

A lock you can clear from the manual is a five-minute job. A faulty panel or control board is not something to repair by trial and error, because it sits close to mains wiring and water. These signs suggest it is time for professional help:

• The display stays blank or frozen after a full restart.
• The RCD trips when the spa is switched on or when a pump starts.
• An error code keeps coming back after you have followed the manual's advice.
• A flow or heater protection fault comes back within about 48 hours, even after the filter has been cleaned or replaced.
• There is water or condensation inside the panel housing.
• The display is cracked or one or more buttons are stuck down.
• You notice a burning smell, scorch marks or melted plastic near the controls.
• The correct unlock sequence has no effect at all, even after a restart.

If a panel lock, a temperature lock or a flow-related protection state clears when you follow your own steps, that was a normal operating state rather than an equipment failure. You do not need a technician's call-out for it. Call only if the same problem keeps returning or one of the signs above appears.

If the RCD will not stay on, do not use the hot tub until a qualified electrician has tested the spa's wiring and earth bonding. A persistent earth fault creates a serious risk of electric shock in the water.

Some error codes need a technician if they persist after a full power cycle. Typical examples include flow sensor faults (often shown as FLO), overheating (OH) and high-limit sensor trips (HL). Exact codes vary between control systems, so check your manual for the codes your display uses.

If your spa is still under warranty, contact the authorised dealer before you open the equipment compartment or attempt any internal work. Unauthorised repairs can void the warranty cover.

A technician can test whether the fault is in the topside panel, its cable or the main control board. Replacing a topside panel is often simpler than replacing a board, but the right answer depends on the diagnosis. For jobs that are safe to tackle yourself, see our guide to hot tub repairs you can do yourself.

A cracked display, water behind the screen or stuck buttons usually mean the topside panel itself needs replacing. This is a straightforward part swap, and a dealer can often complete it in under an hour once the correct panel for your model is available.

If you need to look inside the equipment compartment, for example to read a model label or show a technician a fault, switch off at the isolator first. The side panel is normally opened by pressing or sliding a small plastic or metal latch and pulling the panel outwards, usually without tools.

After any work in the equipment compartment, refit the side panel firmly. A loose panel lets moisture and pests reach the pump, heater and controls.

How can you stop the panel locking by accident?

Accidental locks are usually caused by pressure or curiosity. A few simple habits will save you from hunting for the manual every few weeks.

• Once you have cleared a lock, open the settings or cog menu and check that Spa Lock is set to off, so it does not come back on by default.
• Make sure the cover sits evenly and does not press on the topside panel when closed.
• Keep towels, drinks and phones off the panel area.
• Show family members and guests which buttons to use and which to leave alone.
• Write the lock and unlock steps for your model on a card and keep it with your manual, or save the manual as a file on your phone.
• If your spa has an automatic lock, check in the settings whether the delay can be changed or the feature turned off.
• Clean cartridge filters about every 4 to 6 weeks and replace them about once a year, or as your manual advises. A filter that looks clean can still restrict flow enough to trigger heating faults and protection messages that are easy to mistake for a lock.
• Test the water chemistry at least weekly. After dirty filters, unbalanced water chemistry is a common cause of sensor faults that show up as protection mode or heater messages on the control panel, so keep pH around 7.2 to 7.6 and total alkalinity around 80 to 120 ppm.
• When you refill the spa, put the hose into the filter housing rather than over the side. The system then fills from the bottom up, which prevents airlocks that can trigger flow and heater protection errors.
• Fill the spa to about the midpoint of the skimmer opening before you restore power, then add a start-up chemical treatment as your manual or product label directs before anyone gets in.

Used on purpose, a lock is a helpful feature. A settings lock on a sensible temperature is a simple way to keep the water safe and steady between uses, especially with children in the house.

Summary: unlocking your control panel the safe way

Start by working out whether you have a full panel lock, a settings lock or a fault. A lock symbol with a normal display usually means a lock, while a blank screen, error codes or no response at all point to a fault.

Find your model and serial number, use the official manual for the exact unlock sequence, and avoid random combinations. If a careful retry and a restart at the isolator do not help, or the RCD trips, stop and call a qualified technician.

Frequently asked questions

Why did my hot tub panel lock itself?

Most often, someone pressed the lock sequence by accident, or the cover or a towel pressed buttons when it was closed. Some panels, especially on inflatable spas, also lock automatically after a short time without use. Check your manual to see whether your model has an automatic lock and whether you can change or switch off that setting.

Will turning the hot tub off and on remove the lock?

It depends on the control system. On some spas, a restart at the isolator clears the lock. On others, the lock setting is stored in memory and comes back as soon as power returns, which is deliberate so a power cut does not unlock the panel. Your owner's manual should say which behaviour applies to your model.

Can a locked panel stop my hot tub heating?

Normally, no. A panel lock or settings lock only blocks button presses. Heating, filtering and frost protection carry on using the settings that were active when the lock went on. If the water is cooling while a lock is on, the cause is more likely a heater fault, a tripped safety sensor or an error code, so check the display for messages.

I bought a second-hand hot tub with no manual. What should I do?

Find the serial number label on the cabinet or control box and note any brand name printed on the topside panel. Use these to download the manual from the manufacturer's official site, or contact a dealer for that brand. Many older manuals are still available. If the panel uses a Balboa or Gecko system, their documentation may cover your keypad.

Is it safe to leave the settings lock on all the time?

Yes. A settings lock is designed to stay on and does not harm the spa. Many owners use it to keep the temperature fixed at a comfortable level, no higher than 40°C (104°F), and to stop accidental changes to filter cycles. Just keep the unlock steps somewhere easy to find so you can make changes when needed.

Should I replace the control panel if one button no longer works?

Not straight away. First clean and dry the panel, check nothing is pressing on it, and confirm a lock is not blocking that particular button. If one button still fails while the others work normally, the panel overlay or keypad may be worn. A technician can confirm whether the panel or its cable is at fault before you replace anything.

My hot tub cover is locked. How do I open it?

Sometimes a locked hot tub means the cover rather than the control panel. Most cover straps fasten with clip or buckle latches that you squeeze or lift to release. A keyed cover lock opens with the key supplied with the spa, often kept on the same key ring as the equipment compartment door key, so ask the seller or dealer if it is missing. If a latch feels stiff, a little silicone spray on the moving parts usually frees it up.