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Why Is My Inflatable Hot Tub Not Heating Up

If the filters of your hot tub are not clean, lack proper water circulation, or have technical glitches, the heating of your hot tub can be impacted. Do not worry, as in this article, I will help you understand the mystery of your hot tub not getting warm.

I have been there asking myself, “Why is my inflatable hot tub not heating?”. I have come across various problems. Some were easy to resolve, while others required additional research. Hence, I will be your companion sharing insights with you from personal experience.

In this article, I will take you through water circulation, heating elements, power supply, etc. Come along as I unravel the secrets of a cold inflatable spa tiring you with disappointments, and revive the hot tub experience.

What Is An Inflatable Hot Tub?

The inflatable hot tub market is projected to reach 2,631 million by 2030. Inflatable hot tubs are similar to transportable paradise in backyards. It is like having a regular hot tub with the added convenience of inflation. These lightweight marvels are simply malleable, soft-sided tubs that are simple to assemble and disassemble, unlike swimming pools. Their sturdy construction, which frequently combines reinforced fibers with PVC, gives them flexibility and structural integrity.

I have purchased the INTEX 28451EP PureSpa Greystone Deluxe Spa Set for my relaxing sessions. I simply fill it with water, inflate it, and allow the built-in heating system to work. The majority of inflatable hot tubs have jets that provide a calming massage. These are affordable and compact substitutes that allow you to enjoy the opulence of a hot tub experience wherever you want.

Common Hot Tub Temperature Control Problems

Understanding the factors that impact the heating of your hot tub is the first step toward troubleshooting heating issues with your Inflatable hot tub. You can implement targeted solutions by identifying and understanding the heating issues with your inflatable hot tub. Hence, here I will explain to you the various factors and how they interfere with the heating process.

Power Supply Issues

  • Insufficient Voltage: The power source of your inflatable hot tub is essential. Slow heating can result from the heating element not operating at its best because of low voltage. A voltage drop may occur if your hot tub is connected to the same circuit as other high-energy appliances.
  • Tripped Circuit Breaker: One of the most frequent causes is a tripped circuit breaker. It makes the heating system inefficient by interfering with the electricity supply. A malfunctioning breaker or overloading of the circuit can cause this.

Heating Element Problems

  • Burned Or Corroded Element:  The heating elements degrade over time, which leads to corrosion and burnout. Wear and tear, chemical imbalances or poor water quality can all contribute to this. A damaged heating element finds it difficult to produce enough heat, which affects how warm the water gets overall.
  • Faulty Thermostat: The thermostat controls the water temperature in the hot tub by acting as an internal thermometer. An erroneous temperature reading from a broken thermostat might lead to the heating system either under or overcompensating. 

Water Circulation Issues

  • Clogged Filters: The filtration system in your hot tub is essential to preserving the water’s quality. Water movement is reduced when dirt or mineral buildup and clogs the filters. The hot water isn’t dispersed evenly due to poor circulation which makes some places colder than others.
  • Air Locks: When air pockets obstruct the water’s easy passage through the system, airlocks arise. These air pockets interfere with the heating process because the hot water finds it difficult to circulate.

Environmental Factors

  • Ambient Temperature: The ambient temperature can affect the ability of your inflatable hot tub to heat efficiently. It takes longer for the heating system to reach the ideal water temperature in colder climates. The heating element may become overwhelmed by extremely low temperatures, which would result in a reduction in warming.
  • Wind Exposure: Excessive wind exposure might cause heat loss in your hot tub. The water loses heat more quickly when there is wind because it increases evaporation. This has a particularly negative effect on the heating process that makes it hard for the system to keep up.

Inadequate Insulation

  • Lack Of Thermal Cover: Maintaining a proper temperature is difficult without a thermal cover as the hot water loses heat to the air in the surroundings. Even an efficient heating element finds it difficult to keep up with the heat loss.

Water Level Fluctuations

  • Low Water Level: Your hot tub needs a maintained water level to function at its best. Heating elements might get exposed due to low water levels which can result in overheating. A low water level can be harmful to the heating process since it also affects the efficiency of heat transmission, which is determined by the ratio of water to the heating element.

Chemical Imbalances

  • pH Level Irregularities: It is important to know the chemical balance of the water in your hot tub similar to checking the pool water accuracy. An excessively high or low pH might have a negative effect on the heating system. High pH values can cause mineral deposits on the heating element, which lowers the element’s effectiveness and obstructs the flow of heat.

Equipment Wear And Tear

  • Aging Components: Your inflatable hot tub’s parts are subject to wear and tear over time, just like any other machinery. This covers the house appliances, pump, and other essential heating system components. The water may not heat up as quickly as it should because aging components may not give you the best results.

Troubleshooting Hot Tub Heating Issues

Once you have identified the problem, the solution can’t be hidden far away, so without any ado let me take you through the troubleshooting measures you can take to fix your spa companion.

Power Supply Issues

  • Check Voltage: I prefer having a  dedicated power supply with sufficient voltage for my hot tub. Sharing a common circuit with multiple high-energy appliances might cause a voltage drop.
  • Inspect Circuit Breaker: Investigate the potential overloads or malfunctions, if the circuit breaker trips frequently. I consider resetting the breaker and the monitor for any reoccurrences. 

Heating Element Problems

  • Inspect The Elements: Check for signs of burnout and corrosion of your heating element to get on with hot tub heating element repair if necessary. I immediately replace the heating element of my inflatable hot tub if any such signs are visible.
  • Test The Thermostat: Check the accuracy of your thermostat by comparing it with an outside thermometer. Replace the thermostat if you see any significant variation.

Water Circulation Issues

  • Clean FIlters: To avoid obstructions, clean and replace filters on a regular basis. Proper water circulation can be confirmed with clean filters which facilitates the heating process.
  • Address Air Locks: Open any air relief valves to bleed the system and address airlocks. This aids in getting rid of air pockets that obstruct water flow.

Environmental factors

  • Consider Ambient Temperature: In colder regions provide extra time for heating. To reduce heat loss, think about insulating the area around the hot tub.
  • Use Windbreakers: Use barriers or windbreakers to protect your hot tub from strong wind. It will help you to reduce evaporation and heat loss.

Inadequate Insulation

  • Install a Thermal Cover: I have invested in the Cover Guy premium hot tub cover, which is a high-quality thermal cover that helps me trap the heat with minimum escape. You must always use the cover whenever the hot tub is not in use.

Water Level Functions

  • Maintain Adequate Water Level: Confirm that the water level stays within the suggested range by checking it regularly. By doing this, the ideal water-to-heat element ratios are maintained, and the heating element is kept hidden

Chemical Imbalance

  • Monitor pH Level: Check and adjust the water of your hot tub’s pH level regularly. By doing this you will avoid mineral accumulation on the heating element which will maintain the pH level within the range.

Equipment Wear And Tear

  • Regular Maintenance: Examine every hot tub component from time to time. To confirm the complete system functions properly, replace any old or worn-out parts right away.

Note that troubleshooting is an organized procedure. Begin with the fundamentals and work your way up to more intricate solutions. It’s always a good idea to refer to the manufacturer’s instructions or get professional help if you are not sure or keep having a similar problem.

How To Maintain An Inflatable Hot Tub

Maintenance is essential to extend the life of your inflatable hot tub and enjoy those relaxing hours.  

Steps Description
Filter MaintainanceI have a regular maintenance schedule for filter replacement and cleaning. It ranges from once a week to once a month, depending on the usage. I keep effective water filtration and circulation in check by cleaning the filters.
Surface CleaningRemember to clean the tub’s interiors and exteriors regularly. This prevents the accumulation of filth, grime, and any possible pollutant.
Heating System CheckCheck the thermostat, heating element, and related parts on a regular basis. Examine any indications of deterioration, rust, or wear.
Drain And RefillRemember to empty and restore the hot tub every few months. By keeping the water fresh you will avoid any mineral buildup and preserve the purity of water.
Secure Power SupplyConfirm that the electric supplies are shielded from the weather if your hot tub is situated outside. Extension cords and outlets that are weatherproof can assist in avoiding electrical problems.
Store ProperlyStore your hot tub appropriately if you won’t be using it. To avoid damage from freezing temperatures, follow the manufacturer’s guidelines for winterizing. It is as important as winterizing a swimming pool.

Remember, routine upkeep not only guarantees a more pleasurable time in the hot tub but also increases the longevity of your inflatable hot tub.

When Do You Need To Seek Professional Help

Working as a hot tub detective might be boosting but there are occasions when makes more sense to hire an expert. The following situations indicate when seeking professional help is necessary.

  • Persistent Heating Issues:

In the times when your troubleshooting attempts fail to get the hot tub to warm up effectively, it’s obvious that you need to call a professional. They have more access to the heating system and can locate and fix complicated problems.

  • Electrical Problems:

An electrician with certification should handle any problems relating to the electrical components, including effective wiring and unexplainable sparks. Electrical knowledge guarantees security and averts possible risks.

  • Persistent Leaks:

Minor leaks may be controllable, but persistent or serious leaks need professional care. An expert in leak detection can locate the source and offer workable fixes.

  • Unusual Sounds:

Unusual noise coming from the pump or other parts could be signs of internal problems. A hot tub specialist can identify the source of any possible mechanical issues.

  • Complicated Pump Or Motor Repair:

 If the motor or pump breaks down, trying the repair yourself could worsen the issue. Skilled hot tub technicians can identify and repair the intricate issues with the pump or the motor.

  • Manufacturer Warranty Concerns:

You do not want to miss out on the benefits of performing DIY tricks if your hot tub is still under warranty. If covered under warranty, I highly recommend that you consult the manufacturer or an authorized service provider.

Do not forget the professionals there to make your hot tub experience stress-free and enjoyable. Hence, don’t hesitate to reach out to an expert if you have a doubt.

Frequently Asked Questions (FAQs):

What are the common mistakes that lead to inflatable hot tubs not heating properly?

The common mistakes can prevent your inflatable hot tub from heating properly. It is normal to underestimate the importance of a well-insulated thermal blanket, which lets heat escape and slows down the warming process overall. Uneven heating can be caused by careless maintenance, particularly when it comes to ignoring dirty filters. 

Ignoring the water level is another mistake to avoid since exposing the heating element is not what you want to do, this can cause inefficiencies. Users frequently fail to account for the effect of external factors like high winds or exceptionally low temperatures, these factors can limit the heating process.

It is important to be aware of these typical mistakes to make sure your inflatable hot tub constantly provides the comforting feeling you want.

What are the preventive measures to ensure my inflatable hot tub consistently heats up?

There are some proactive steps to make sure your inflatable hot tub gives you the cozy experience you want every time. Maintain ideal pH and sanitizer levels by testing and balancing the water chemistry regularly. To confirm effective water circulation, establish a schedule for filter replacement and cleaning. Invest in a high-quality thermal cover and use it consistently to save energy and retain heat. 

Check the hot tub for structural deterioration regularly and fix any problems right away. Lastly, follow the maintenance, draining, and refilling instructions provided by the manufacturer. By incorporating these guidelines in your hot tub maintenance routine, you not only enjoy a good hot soak but also increase the longevity of your inflatable hot tub.


  • Raoul Hayes

    Raoul Lobo is a seasoned expert in the realm of home appliances and environmental comfort. As a prominent author at, Raoul's passion and expertise shine through in his insightful articles and guides. With years of hands-on experience, he has become a trusted source for readers seeking advice on pools, washers, dryers, and a wide range of other appliances.

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