- If the pilot light on your swimming pool heater refuses to come on, it is likely a problem with low pressure from the gas line. Check to make sure the gas is switched on. If using a propane fuel source, check to ensure the tank has adequate propane. Another issue could be with the air supply. If enough air isn't getting to the pilot, this could prevent a light. Check to see if there is any runoff from the sprinklers or even the roof of your house blocking air flow.
- If your swimming pool heater seems to be working, but the pool itself isn't reaching the temperature you desire, your first item of business is to check the thermostat. If it is already set above the current temperature of the pool, do not make a further adjustment. Consider the outside temperature and match it to the size of your heater. It may simply not be powerful enough to counteract the loss of heat you're experiencing due to either the size of your pool or the outdoor temperature. Trying to force it to overcome this could result in a burnout. A good compromise is to supplement your heater with a solar cover, which can absorb the heat from the daytime sun and give your heater less to contend with.
- This is often caused by insufficient water flow. Check and clean your filter, and make sure there aren't any open valves. You may also want to give your thermostat a good look and ensure that it doesn't need replacing. If it is fluctuating or not keeping the correct temperature, it could very well be the source of your problems.
- Check the heat exchanger to make sure that chemical damage isn't causing the leak. This is a common problem, especially for those who like to over-chlorinate their pool or use other chemicals without frequently cleaning out their heater. Check your gaskets and ensure that winter freezing hasn't caused any cracking.
