Why Is My Hot Tub Getting Too Hot?

The most common cause attributed to hot tubs overheating is a result of the pump running for extended periods of time. This is often due to either extended filtration cycle settings or a malfunction within the control system itself. 

The recommended filtration cycle sets a hot tub’s pump to run for 2 hours consecutively every 12 hours. This can be fixed by adjusting the temperature settings.

Simply decrease the pump’s run time on the hot tub’s display until the desired temperature and running times are set. Then, the appropriate temperature should be reached and maintained without it overheating. 

However, if there is a malfunction in the system itself, the issue is deeper and harder to fix. It could be that the hot tub’s pump needs to be replaced, or filters might be dirty.

For this reason and many others, it is important to keep proper hygiene and maintenance routines regarding one’s hot tub. However, if the tub is cleaned and inspected, and everything appears normal, the hot tub manufacturer should be contacted for help. 

Is 110 too Hot for a Hot Tub?

A hot tub should never, under any circumstances, reach a temperature of one 110 degrees Fahrenheit. In fact, the Consumer Products Safety Commission (CPSC) set the maximum temperature of hot tubs to reach no higher than one 104 degrees Fahrenheit due to safety concerns.

Any temperature higher than this is considered to be dangerous as it can lead to severe health risks and even death. To ensure the utmost safety, a temperature of one 100 degrees Fahrenheit is suggested as being the highest set temperature for hot tubs being used by healthy, fully grown adults.

Such heavy restrictions are put in place, because high temperatures cause drowsiness, dehydration, an increase in blood pressure, and more which can lead to serious accidents and health conditions. 

How do I Reset my Hot Tub Heater?

A hot tub heater can be reset in 4 easy steps. Resetting a hot tub’s heater is a fairly common practice as they tend to trip from time to time and stop working. 

  1. First, find the red button known as the hot tub’s high-limit reset. It is often located on the hot tub’s heater and covered with a red nipple. 
  2. Second, press the high-limit reset button until you hear it click in place. 
  3. Now, turn the hot tub back on and ensure that it is once again working correctly. In the instance that the hot tub is not working, it is likely that a breaker panel or ground-fault circuit interrupter (GFCI). 
  4. Simply flip the breaker panel switch to turn on, or press the switch on the GFCI outlet.

Taking these steps should restore power to the hot tub. At this point, you should have successfully reset the hot tub’s heater and successfully restored the hot tub to its working condition. 

However, if the hot tub is not working at this point, it is most likely due to a faulty heater element which will need to be replaced in order to fix the it. 

How do I Cool Down my Hot Tub?

The first step to take when attempting to cool down a hot tub is to reduce the temperature setting to be as low as possible. This usually results in a temperature setting around 80 degrees Fahrenheit.

Reducing the set temperature will essentially turn the heater off and allow the water to cool. However, doing this is a slow process, and depending on the area in which one lives, may not do much to reduce the water’s temperature. 

Therefore, hot tub owners often get creative in order to find ways to efficiently cool down their hot tub’s water.

  • First, it is wise to remove or lift the cover from the hot tub in order to allow the heat to escape from the water.
  • Next, owners should run the hot tub’s jets on a 2-hour cycle in order to provide circulation in the water. 
  • After taking the aforementioned steps, ice is a great method to quickly cool hot tubs. Simply toss bags of ice into the hot tub and wait. This method does no harm to the hot tub but works to cool the water very quickly. 
  • Lastly, increasing the frequency at which the hot tub’s filters are run in order to keep the water circulating to dispel the heat, and some cooling systems that sit on the outside of a hot tub can be purchased to keep it cool.

However, don’t be afraid to get creative, either!

What Temperature is too Hot for a Hot Tub?

Hot tubs should never exceed a temperature of one 104 degrees Fahrenheit. This is the maximum temperature that any hot tub can be set to reach, but it is often still too hot for individuals.

I have a whole different article on this topic if you are interested to find out more about how different temperatures can affect different people, and revealing the most ideal hot tub water temperature. You can read it here.

Most healthy adults prefer a temperature between one 100 and 102 degrees Fahrenheit. 

However, due to them being significantly smaller than most adults, it is not wise for children to be exposed to such high temperatures, particularly if they are spending longer than the 10 to 15 minutes recommended for hot tub use. 

These temperature restrictions are put into place in order to protect the safety of all hot tub users. 

How do you Test a Spa Thermostat?

To test a spa’s thermostat, first shut off all power to the hot tub. In newer hot tubs, most thermostats have been replaced by what is known as a temperature sensor.

This connects to the main circuit board for the spa. Users should ensure that the sensor is plugged in tightly and that there is no damage to the cord. If adjustments are made and the temperature is not displaying correctly, it is most likely the result of a faulty sensor. 

In older hot tubs, the thermostat should be tested internally for a faulty capillary bulb. If the sensor bulb or any other part of the thermostat has become corroded, it will no longer read the temperature correctly.

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Emily Williams

Emily is a passionate Hot Tubs researcher who loves writing about all things Hot Tubs! She has years of experience and a knack for simplifying complex concepts, these articles are here to answer all your burning questions in a simple and easy to read style.
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