Question about Pentair Mastertemp Pool & Spa Heater Dual Electronic Ignition 400,000 Btu Lonox Propane 460737
This has something to do with a water temperature sensor which normally is a thermocouple.It seems that yours is reading the water temperature,sends a feedback signal to some sort of computer type controller,and when the heater output water starts getting a bit hotter than the temperature which it knows the water currently is,it's shutting down.Within thermocouples,there is a small section known as a reference temperature.That section sounds like it's gone bad because when comparing the temperatures and going above the reference,the best way to describe it is it's like popping a circuit breaker in your house,which causes shutdown,but in your house it's to prevent fire and/or save the housing wiring.In the pool heater,it's saving the water from boiling because it doesn't know when to stop.If you need more help or this is not correct,just comment back here and I will get an autolink to your post and reply ASAP.Good luck! Greg
Posted on Oct 16, 2010
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Posted on Jan 02, 2017
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