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Hi I hay a Hayward H400 pool heater. It is 2

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.

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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.

Posted on Apr 25, 2010

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Posted on Jan 02, 2017

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