Question about Hayward 250kbtu Ng Pool Heater - Inground

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Error code either 5f or sf. any suggestions - Hayward 250kbtu Ng Pool Heater - Inground

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Temp sensor failure. The temp sensor should be screwed into the header near the plumbing and is wired in to the control panel ( where you raise or lower pool temp) Almost positive the wire is blk/red

If you unscrew the temp sensor and its corroded ( green) try cleaning it with a wire brush, if it still doesnt work, replace the sensor. Worst case, the new sensor doesnt work, that means the old sensor was fine and its the board that its plugged into thats bad. Not likely, but always possible... sensor is much cheaper then a board so go that route first.

Posted on Aug 22, 2010

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Posted on Jan 02, 2017

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5 f code after hearing poping noises filter and pump are new


SF (not 5F) = Temperature Sensor or Thermistor
HS = High Limit Sensor
Heaters Set Temperature out of Sync with actual Water Temperature.
Heaters Maximum Water Temperature has been Exceeded.
A few reasons this occurs...
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But anyway, your heaters fault code you asked about does not necessarily mean the sensor failed, but is only informing of a problem.

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1 Answer

What should I do if Hayward pool heater is reading error code SF??


The code is SF. This is a teemperature sensor failure. Check the wiring on the electroniics bord and confirm its not damaged and that it is securly plugged in. If all is good than the temperature sensor will need placing.m either a gas fitter or swimming pool reepair center will help with this is your not comfortable replacing it

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1 Answer

ERROR MESSAGE 5F


This fault concerns the relay drive circuit. If this fault code cannot be canceled, replace the oven control (also called clock or ERC).

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