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Emergency Service


Your Comfort is Our Priority!

Emergency Service



Pool Heater Issues You May Run Into

Monday, September 25th, 2023 at 11:00 am

Temperatures are beginning to cool down. But you have a pool heater, so that means your family can enjoy the water for longer into the fall even as temperatures continue to drop. But what happens if your pool heater is not heating enough?

It may be time to call and schedule service for your pool heater. If you suspect that something is wrong with your pool heater now, it’s better to get the problem addressed sooner rather than later. You can keep reading to learn more about common pool heater problems, the signs of each one, and ways that you can try to troubleshoot them. 

Clogged Filter

One of the most common reasons for a pool heater not to work is that the filter is clogged. If the filter is so dirty that water cannot pass through, there is no water entering the heater to be heated in the first place. If you suspect that something is wrong with your pool heater, this should be the first place you check. Clean out the filter thoroughly and replace it. See if that makes a difference. If not, you may need to keep troubleshooting with the additional steps below. 

Safety Switches 

Your pool and the attached pool heater have a lot of different components working together. You may not think about electricity being required to operate and heat your pool, but it is. As a result, your pool has a variety of safety switches to make sure that nothing goes wrong. After all, electricity and water don’t usually mix. Examples of safety switches include the pressure switch and the high limit switch. 

Other safety-related components that can also contribute to pool heater problems include the gas valve and pilot generator. You can check each of these switches and connections to make sure that they appear to be in good working order. If you think that something is wrong, give our team a call to schedule pool heater service.


It’s also possible that your thermostat is contributing to pool heater problems. Just like the thermostat that is attached to your air conditioner, your pool heater has a thermostat that reads the temperature and signals when the pool heater needs to heat water. 

The thermostat may be miscalibrated or malfunctioning. You can try turning up the thermostat settings to see if your pool gets warmer. Even if it does, we encourage you to schedule an appointment with our team to get the thermostat checked out. You shouldn’t have to continually set your thermostat higher and higher to keep your pool at a consistent temperature. If changing the thermostat settings doesn’t work, we can still help troubleshoot additional problems with your heater. 


The weather can also have an impact on your pool heater’s operation. Many pool heaters will not operate if temperatures are lower than about 60°F. You may have to read the instructions for your specific pool heater to see what temperatures it works in. If temperatures dip below 60°, your pool heater may not operate at all. This is because your pool heater cannot sustain keeping the water warm against particularly cold temperatures.

Serving St. Johns County since 1988 with quality, hometown service. Schedule an appointment today with the Climate Masters team for pool heater service.

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