Reuben Posted January 24, 2022 Report Share Posted January 24, 2022 My spa is a down east spa with a mas 460 pack. It has the m7 sensors and no pressure switch. Spa is moving good water. I have 240 volts to board but only 115 volt to heater. Heater light will not come on. Any advise would be great. . Quote Link to comment Share on other sites More sharing options...
CanadianSpaTech Posted January 25, 2022 Report Share Posted January 25, 2022 Disconnect the 2 copper tabs from the heater element and then test for 240V when the spa is calling for heat. If you get 240 replace the heater element if you only get 120V then you might have a bad/burnt relay. Remove board and look on back for darkened or burnt areas. Post pics of the circuit board and the schematic on the inside cover. Any Error codes? Is the spa in "Standard Mode"? Quote Link to comment Share on other sites More sharing options...
Reuben Posted January 25, 2022 Author Report Share Posted January 25, 2022 Thanks for advice. I will unhook element tommorow and see if I have 240 volts. I will check on what mode It is in. Quote Link to comment Share on other sites More sharing options...
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