geb724 Posted February 14, 2021 Report Share Posted February 14, 2021 my mastertemp 250 heater was cycling on and off as it has done before. replacing the thermostat (pentair part # 38000-0007S) seems to work for about 6 months. it was happening again recently so i started to take the thermostat out. all that came out was the spring. the thermostat remained in the manifold. i tried to take it out with a pair of pliers but it slipped down into the manifold to where i could not reach it. i took the manifold off today and it was not in there. i have a feeling it is in one of the many pipes connected to the pool and heater. i checked the filter thinking it might be in there but its not. any idea where it could be and how to get it out? Quote Link to comment Share on other sites More sharing options...
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