Hayward H250


Old 09-08-08, 06:46 PM
Thread Starter
Join Date: Sep 2008
Location: Dayton Ohio
Posts: 1
Hayward H250

Hi to everybody, rookie question what does the 5F message on my heater represent & how do i go about fixing my problem. The owners manual isnt clear.... please help Thanks Brent
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Old 09-09-08, 02:44 PM
Join Date: Jul 2005
Location: New York
Posts: 723
The trouble code is likely an SF, not 5F. Regardless....

SF indicates a thermistor failure. The thermistor is the part that goes from the thermostat (or control board) to the heat exchanger that senses the actual water temperature.

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