I have a Rheem PowerVent Gas water heater that when it heats, it heats very
well. Lately I have found that we are running out of hot water; when I
check on the water heater I find the vent fan running but the gas not lit.
If I power the unit off and power it on again the vent fan starts spinning
and the heater runs through its ignition cycle, the gas lights and the
heater appears to heat the unit for a couple days worth of hot water. Sure
enough a day or so later I have go through the whole process again.
Any ideas as to what might be going on?
Any help would be appreciated.