Troubleshooting Your Strong Spas Hot Tub: Why It’s Not Heating & How to Fix It

Strong Spas hot tub

If you’re like me, a dip in a hot tub is the perfect way to unwind after a long day. But what happens when your Strong Spas hot tub isn’t heating up? It’s not just a bummer; it’s a problem that needs a solution, and fast.

I’ve been there, and I know the frustration. You’re ready for relaxation, but your hot tub has other plans. But don’t worry, I’ve got some tips and tricks to help you get back to your warm, soothing soak in no time.

Key Takeaways

  • Your Strong Spas hot tub not heating up might be due to various causes such as faulty heating elements, malfunctioning thermostat, low water flow due to clogged filters or pumps, circuit breaker issues, or poor insulation.
  • Checking the power source is the first step, ensuring the outlet voltage is correct and inspecting the condition of power cords and connections.
  • The thermostat, often neglected, plays a crucial role in controlling hot tub temperature and should be consulted regularly, adjusting its settings according to your requirements, or replaced entirely if it’s not functioning properly.
  • Regular inspection and maintenance of the heating elements are necessary as they directly affect the water temperature. Signs such as discoloration, blistering, or black spots indicate it’s time for a replacement.
  • Regular filter maintenance is crucial to prevent clogs that restrict water flow and compromise heat distribution. Ensure the filter is cleaned thoroughly every one to two months and replaced entirely after 12 to 15 months of use.
  • Professional help is recommended when dealing with complex technical issues such as electrical problems, thermostat sensor issues, or handling heating elements.

Common Reasons for a Strong Spas Hot Tub Not Heating

Hot tubs are supposed to be the definition of relaxation. But that’s not happening if your Strong Spas hot tub isn’t heating. Let’s dive into some common reasons why your tub’s just not warming up.

Faulty heating elements are often the leading cause. Heating elements are the heart of your hot tub’s heating system. They’re working hard to make sure you get the perfect soak. But, like anything, they wear out over time.

Another usual suspect is a malfunctioning thermostat. This gadget regulates the temperature and shuts down the heating elements once the water reaches the desired level. If it’s faulty or incorrectly calibrated, it might cause your hot tub to cool down.

The low flow of water can also cause your hot tub not to heat. This could be due to clogged filters or pumps or closed valves. Lack of water flow leads to inadequate heat transfer making the water temperature drop.

Next on the list are circuit breaker issues. These can be trickier as it could be just a simple tripped breaker or a more complicated electrical problem.

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Finally, checking the hot tub insulation is important. Even if your heater, thermostat, and pipes are working perfectly, poor or damaged insulation can let heat escape.

Take a good look at these possible reasons:

Places to CheckPossible Problems
Heating elementsWear and Tear
ThermostatIncorrect calibration
Water flowClogged filters or pumps
Circuit breakerElectrical problems
InsulationWorn out or damaged

By addressing these factors, you’ll likely solve the problem and can get back into that wonderful warm water. So, let’s get into how you can identify and fix these issues, shall we?

Check the Power Source

Tackling the mystery of a chilly hot tub, it’s important to start from the root source: power. If there’s no power, the heating elements can’t do their job, and your once cozy spa retreat turns into a polar bear’s swimming contest.

Before diving deep into the technical aspects, let’s ensure that power isn’t the issue. There are a few quick checks you can make:

  • Outlet Voltage: Ensure the power outlet’s voltage is where it should be. Usual readings must be between 220-240 volts for most Strong Spas hot tubs. A simple non-contact voltage tester can get this job done in a snap.
  • Circuit Breaker: Check if your tub’s dedicated breaker has tripped. If it’s switched off, flip it back on and see if your tub’s heating up again. If it trips routinely, reach out to a professional; there might be a deeper issue.

You also want to ensure the quality of your cords and connections. Aging and natural elements can wear out the power lines, and rodents can feed on the wiring. An unusual wear-and-tear or chewing marks can mean it’s time to replace your cords.

Please note that all electrical work is dangerous, especially around water. Hence, it’s highly recommendedonly a licensed professional handle any electrical repairs or modifications.

Moving forward, now that power isn’t an issue, let’s delve into other potential causes that can prevent your Strong Spas hot tub from heating up. Keep reading to nail down these chilling culprits and bring back the soothing hot experience you crave.

Inspect the Thermostat

A crucial aspect to look at when your Strong Spas hot tub isn’t heating up is the thermostat. The thermostat controls the hot tub’s temperature. It’s often a neglected component, but without it functioning properly, your hot tub will definitely be left out in the cold.

An incorrectly set thermostat could be the principal cause of your heating woes. I’ve seen cases where the knob or dial is inadvertently turned down. The fix here is straightforward: tweak the thermostat settings and ensure it’s set at your desired temperature.

On the other hand, if the thermostat itself is malfunctioning, you may need to call in a professional for repairs or replacement. To determine this, check the thermostat’s readings against an external thermometer; mismatches indicate potential thermostat issues.

And what about the more complex internal issues? Thermostat sensor issues, for instance, can result in the tub not heating up. Faulty sensors will not record the correct temperature, leading the heater to stay off. Sensor problems are typically beyond average DIY capabilities, so getting a professional’s help is highly recommended.

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Coming up, let’s look at another potential culprit when your Strong Spas hot tub refuses to heat up: the heating elements. Problems with these components can also prevent your hot tub from reaching the perfect relaxing temperature, so make sure to keep reading for useful knowledge.

Examine the Heating Element

Shifting focus to the heating elements of your Strong Spas hot tub is essential. It’s this component that directly influences the water temperature and thus plays a crucial role in satisfaction. Even with a fully functioning thermostat, a faulty heating element could lead to lackluster performance.

It’s reasonable to start the inspection by observing the general condition of the heating elements. Signs of wear and tear are common indicators of impending failure. While it’s normal for elements to degrade over time, it’s imperative to replace them promptly to restore optimal functioning.

You may wonder about the specifics to look for during the inspection. Here’s a handy list to guide you:

  • Discoloration or scaling on the element
  • A blistered or swollen appearance
  • Evidence of a burnout, such as black spots

Aside from the physical signs, your hot tub’s behavior can point you to a failing element. For example, if your hot tub’s water is taking longer than usual to heat up, likely, the elements aren’t functioning as they should.

For a more precise assessment, a multi-meter can be your best ally. It’s a straightforward process:

  1. Ensure the hot tub is unplugged to avoid any electrical hazards.
  2. Set the multi-meter to measure resistance (Ohms).
  3. Place the probes on the contact points of the heating element.

For Strong Spas hot tubs, a healthy heating element should register a resistance between 9-12 Ohms. Any reading outside this range is a red flag.

However, let’s note that dealing with electrical components carries inherent risks. It’s perfectly fine, and often advisable, to reach out to a professional if you’re unsure about any of these steps. Just remember, that maintaining the integrity of your heating elements is key to keeping your hot tub in peak condition. As we navigate through the complexities that could hinder your relaxing soak, let’s explore another factor – low water flow.

Clean and Maintain the Filter

When focusing on the low water flow condition, it’s essential to consider the state and cleanliness of your filter. Debris and buildup can prevent the necessary circulation, which will affect the overall heat distribution.

Often, a clogged or dirty filter is the culprit, restricting the water flow and therefore stopping the heater from working. To ensure the water can move freely, regular filter maintenance is not just recommended, it’s a must. Make it a routine to clean the filter thoroughly. Depending on your usage and local water condition, I’d advise doing this every one to two months.

So, how do you clean a hot tub filter? Begin by removing the filter – and don’t panic if it’s a dirty brown color. That’s totally normal and a sign it’s been working hard to keep your hot tub clean!

Rinse it off using a hose, aiming to shift any obvious bits of dirt or grime. Avoid high-pressure water sprays though, as these can damage the filter fabric. After rinsing, soak your filter in a specialized filter cleaner to dissolve accumulated oils and minerals. Once it’s been soaked according to the cleaner’s instructions, give it another rinse and allow it to dry thoroughly before placing it back to the hot tub.

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Is your filter looking worse for wear, even after cleaning? Then it’s probably time to replace it. A typical hot tub filter can last up to 12-15 months with regular maintenance before needing to be replaced.

In case you’re wondering, a clean filter can do more than just maintain optimal water flow. Efficient filtering also contributes to the lifespan of the pump, pipes, and other components, which means fewer breakdowns.

Let us now shift our attention to another common issue that may cause your hot tub to stay cold – the thermostat.


I’ve walked you through the potential pitfalls that might be causing your Strong Spas hot tub to stop heating. We’ve looked at everything from faulty heating elements and problematic thermostats to low water flow and circuit breaker issues.]

I’ve emphasized the importance of routine maintenance, like cleaning your filters and checking cords and connections. Remember, sometimes the issue might be as simple as a worn-out component or a power source problem.

If you’re ever unsure, don’t hesitate to seek professional help. It’s essential to keep your hot tub running smoothly and efficiently. After all, what’s better than sinking into a warm, relaxing hot tub at the end of a long day? So, take these tips to heart and ensure your Strong Spas hot tub provides you with the best possible experience.


What are the common reasons for a Strong Spas hot tub not heating up?

Common reasons a Strong Spas hot tub may not heat up include faulty heating elements, malfunctioning thermostats, low water flow, circuit breaker issues, and poor insulation.

What should be checked when the hot tub is not heating up?

When your hot tub isn’t heating, it’s important to check the heating elements for signs of wear or discoloration, the water flow to ensure the filters or pumps aren’t clogged, the power source including the outlet voltage and circuit breakers, and the cords and connections for any signs of damage.

How to determine if the heating elements are faulty?

One way to check if the heating element is faulty is by inspecting it for signs of wear, tear, or discoloration. Additionally, a multi-meter can be used to assess the resistance of the heating element.

What is the importance of maintaining a clean filter in a hot tub?

Maintaining a clean filter is important as it maintains optimal water flow, which is crucial to heat the hot tub. A clean filter also contributes to the lifespan of other hot tub components.

What could be the possible problem if the hot tub’s thermostat is not working?

If the thermostat isn’t working, it may be malfunctioning or could be wrongly adjusted. A professional should be consulted in this case to make the right assessment and correction.

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