Thread: Koi master heater stopped heating

Hi All,
Bit of help if anyone has a koi masters heater, all is lighting up but its not switching the heat on the light is not showing heat, the water is below the min temp and no errors, any clues??? Was working fine til yesterday

thx

Thanks yes that was it, i took the front off yesterday and there is a little red reset switch, seems a silly design to put that inside the internals rather than on the outside? Anyway all good now, but usure what cased it to trip out?

Seems strange for you to have to take it apart to reset. My heater has a 60c Thermal reset breaker in the case but I believe it’s the type that auto resets.


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The later models it look like the reset is added to the outer shell, on mine you have to unscrew the face plate to get at it and push the red button, not sure if it should auto reset but did not in this case