Rheem Water Heaters - Page 9 - Recent Questions, Troubleshooting & Support

Possible igniter trouble. Should get an expert and watch him and see what he does. That way the next time you just might be able to repair it.

Usually if they won't re-light it's a problem with the orifice on the pilot itself. The thermocouple won't cause it to re-light but it will prevent it from staying on after being lit. Just make sure you have valve set to pilot when you press the red button down to light. You can take out the burner by removing the gas and thermocouple lines, unscrew the orifice and use like a wire brush bristle to clean out the hole in the orifice.

Have a look at the water section might be getting clogged inside , slowing the flow .

Please contact your city permit office for construction requirements, they vary from city to city.

Turn off the main water to the house , turn off gas to heater open lowest hot tap to take pressure off .Undo union on hotwater tap outlet on heater more water will come out , open cold tap at sink that will take pressure out of main . you should be able to change valve with out getting too much wet .

https://www.aprilaire.com/...manuals/.../aprilaire-zoned-comfort-model-6202-owners-...

It could be that the gap for the igniter is too big Try lighting it manually There should not be that much air in the line .

Turn off the heater then open the bleeder valve on top of the tank to let the air escape. Once all of the air has been bled off, faucets included then turn your heat back on.

Ask the local council what the incoming water pressure is you may be able to get a water reg on the incoming line to boost pressure .

just an educated guess but id say you have one of two possible problems , gas valve bad or flame proof device is bad the second cause is very common !! so common in fact theres a spare hanging on the side of mine !!!