If you are having trouble with your pool heater, the first step is to determine what is wrong. The most common problems are a lack of water flowing through the heater, a clogged filter, or an incorrect thermostat setting. If there is no water flowing through the heater, check to make sure that the pump is turned on and that there is enough water in the pool. If the filter is clogged, clean it or replace it. If the thermostat setting is incorrect, adjust it accordingly.

I am having trouble with my pool heater. How do you troubleshoot a pool heater? The first step is to identify the problem. There are many things that can go wrong with a pool heater, so it's important to be specific about what is not working. For example, is the water too hot or too cold? Is the heater not turning on? Are there sparks coming out of the unit? Is there water leaking from the unit? Once you have identified the problem, you can start troubleshooting. There are many things that can go wrong with a pool heater, so it's important to be specific about what is not working.