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Heater stopped firing. Blower comes on, tried 4 or 5 times, then stopped with Service heater light on. AGS light on. AGS switch has continuity, I replaced it, the high limit and igniter anyway. Now, blower comes on, does not fire, AGS light comes on and service heater light comes on. It...

New HSI fixed it.

I have 24 volts out of the board to power the gas valve when it is called for. Yet I only seem to get 15 or so at the valve itself. Before it shuts off, there is a moaning sound as if it has insufficient gas flow. Voltage is consistent until it shuts down the flame. Are gas valves common...

I got a used SR400LP about 5 years ago for free. I finally installed it a couple weeks ago to replace our 200K Raypak, as we don't use solar heat any longer. Pool is tiny. Wife is impatient. Changed the orifice to the natural gas size with a Sta-Rite kit. Installed the unit, piped 1" gas...