Red Warning Light on Rheem Water Heater

How do I figure out what part is wrong with my Rheem Power Vent S/N 1094 D22371: which is powered by the RobertShawcontrols. The water heater won't turn on the gas to heat it up. I think its the Ingition Control Justiceair

I have a Rheem Power Vent hot water heater, model 21VP40-1. My problem is that it will not stay lit on the final start up stage. It operates ok, stays lit, if turned on manualy on the unit. I have replaced the gas valve. I am leaning toward the control module. Any advice?

We are getting a smell around the water heater tank area, that smells like decomp.... There are no leaks and this smell seems to come and go . My wife can smell it much more than I can and she thinks that we need to replace the heater. I can't see how a smell would be coming from the tank if there...

Hello, I have the above heating unit which has failed to start today. It appears to be getting power. The two green LEDs are on and when the thermostat says it is "system on" the left green flashes in groups of 4 flashes and pauses and repeats. About a month ago we had a startup problem and...

I have 50 Gallon Rheem gas water heater that has a igniter button. The water heater will not light when pushing the igniter button. The gas line is open. The tank is only 3 years old and was winterized before we moved in. Do anyone know how to light or bypass the igniter button to light this tank?...