Dis2cruise
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Pool heater won’t work🤦♀️. We have the Lochinvar ER402 Heater operated fine last season. This season the heater will run through the start up cycle but does not fire. We replaced the air pressure switch but still does not fire. We confirmed that there is 7” w.c. Gas pressure at the inlet to the gas solenoid valve. Appreciate any suggestions on what we should check next? Thank you😊