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    An issue with our Hayward H400

    We're having an issue with our Hayward H400. Pool was closed for 3 seasons, just finally opened it again. Heater is dual thermostat (pool/spa), yellow "System Ready" and green "Heating" light, twin-position switch (pool/off/spa), 8 combustion chambers, with DSI. No water leaks, a little dusty...