Hi I have a Hayward H400 pool heater. It is 2 years old. It just started doing this. It starts and then after about 2 mins and it kicks on and off. It keeps cycling like this until I shut it off . Once it starts cyling like this, the cycles are short 5-10 secs. I need to shut it off to stop it. The control panel shows not error codes. Does anyone have any suggestions? Thank you.
This is a water flow problem and will be the by-pass assembly in the water manifold. Or their may be an external by-pass wich will be a valve bridging the inlet and outlet pipes for the water. This valve if you have it should be 80-90% closed to force water through heater. Before you do anything be sure to check to be sure the filter and baskets are clean. Often this is the problem.
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