why pool heater not working


Author: Poolking - Swimming Pool Equipment Manufacturer

Why Pool Heater Not Working?

Owning a swimming pool in your backyard brings joy and relaxation, but only if the pool operates correctly. Unfortunately, when your pool heater isn't working, it can lead to a frustrating experience. Whether it's a malfunctioning pool heater or complete failure of the equipment, it can be confusing to know where to start to identify the problem. Therefore, it's essential to be familiar with the reasons why your pool heater not working, so you can quickly diagnose the issue and restore your pool to its optimum temperature. In this article, we will discuss the most common reasons why your pool heater not working, and how to solve the problems effectively.

1. Dirty Filter

If your pool heater not working properly, the first place to examine is the filter. Filters are critical components of your pool as they help to keep the water clean and clear. If your filter is dirty, it can lead to a blockage and prevent water flow, causing your pool heater not to work. Therefore, it's essential to clean or replace the filter regularly. Inspect the filter pressure gauge to see if the pressure reading is higher than usual. If the reading shows a high PSI, it means there's an obstruction in the filter. You can clean the filter if it's a simple clogging issue. However, if the filter has a larger issue or old age, it would be best to replace it with a new one.

2. Low Water Flow

Another common issue why pool heater not working is low water flow. If your pool pump isn't circulating enough water, the heater won't activate, thus preventing it from warming up the pool water. Check to see if the skimmer or pool pump basket is clogged as the clog could be blocking the water flow. Clear out any debris and check the impeller, which is located in the pump's housing. Broken or damaged impellers can cause low water flow, so it may be necessary to replace the pump.

3. Electrical Issues

Pool heating systems require electricity to function. Thus, if there's an electrical problem, it can cause the pool heater not to work. Check the power source and make sure the pool heater's circuit breaker isn't tripped. An open circuit breaker is a common issue, and you can reset it easily by turning it off and then back on. Also, examine the wiring connections to ensure they're not corroded, frayed, or loose. Faulty electrical connections can lead to an overload in the system, which can damage the pool heating components.

4. Thermostat Malfunction

Thermostats are important components of the pool heating system. It's what helps to regulate the temperature and turn the heater on and off as needed. If the thermostat isn't functioning, the pool heater not working as it should. Check the thermostat settings to see if it's set to the right temperature. If the thermostat is set correctly, but the pool isn't heating up, it could be a thermostat malfunction. You may need to replace the thermostat or seek the help of a professional pool technician to diagnose and fix the problem.

5. Old Age and Wear

Like anything else, pool heaters have a limited lifespan. If your pool heating system has reached its endpoint, it won't function correctly, no matter how much troubleshooting you do. Over time, parts wear out, and components become less efficient, leading to a decline in the pool heating system's performance. If you've had your pool heating system for more than ten years, it may be time to consider replacing or upgrading your current equipment.

Final Thoughts

A pool heater not working is a common problem that can be frustrating and inconvenient. However, by following the tips mentioned above and conducting routine maintenance, you can prevent or identify and fix the problem quickly. Don't allow a malfunctioning pool heater to ruin your swimming experience. Remember to follow the manufacturer's instructions, and seek the help of a professional pool technician if you're unsure of how to diagnose or fix the issue. By taking care of your pool heating system, you'll enjoy more swim time with family and friends.


Just tell us your requirements, we can do more than you can imagine.
Send your inquiry

Send your inquiry

Choose a different language
Current language:English