fscanlan posted an answer for this Honeywell Furnace Air Pressure Switch Is20151-3440:
"Most pressure switches run off of a vacuum not pressure, when the inducer starts it..."
fscanlan posted an answer for this Rheem 50 Gallon FVR NATGAS Water Heater 6YR 22V50F1:
"On the back of the gas valve (where you turn the temp up) there is a stem that actually..."
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