Mike Cat Posted March 31, 2023 Report Share Posted March 31, 2023 Hi All, This is my first post. Don't know if this is the correct place but it's worth a try..... I have an h400 hayward propane heater. When I turn on, the main ac breakers trips instantly. I traced it to the transformer. I think it's shorting the power board from the primary coil. Does anyone know how to test the transformer to see if it's good? Thanks Quote Link to comment Share on other sites More sharing options...
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