Pool heater burners not turning on

149 viewsPentairspa heater
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I have a Pentair mini max NT 400, burners aren’t turning on and the three green lights are on, but not the fourth which is heat. The service light is on as well. I tested continuity through my pressure switches and those are good. I also replaced the igniter. any ideas on what it could be?

Ask the Pool Guy Changed status to publish July 3, 2024

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