Gassy water heater?

[csowers]

I have a 2012 Rockwood Roo 233s with a Suburban gas/electric water heater. On this trip we noticed the gas was not heating the water. The gas ignites, then we see a flame. We have allowed the water to heat for 15-20 minutes with only tepid results. When we enabled the electric, it heated with no problem. Any ideas what could be wrong with the gas system? Everything looks ok, and we are baffled.

[RamblerGuy]

Did you have a good roaring flame for the 15-20 minutes, or did you wait for 15-20 minutes and have tepid water? Maybe the flame went out or the gas thermostat is faulty. The gas and electric thermostats are separate, so a faulty gas thermostat would not prevent the electric part from working.

I assume that you confirmed that you have plenty of gas and that you have pressure at the stove and furnace. Do you have an automatic tank changeover valve that could have malfunctioned?

[DAISY BOYKIN]

Check the gas/air mixture tube for any obstruction (bugs, spiders). It may be necessary to blow the tube to clean it out with compressed air to clear any obstruction. I even had to remove to clear it of a large dead spider. If there is an obstruction in the tube, it will cause an uneven flame.

[csowers]

Thanks for the input RamblerGuy and Daisy. In answer to your question, yes I did have a roaring flame for the entire 15-20 minutes. I didn't realize the thermostats were separate. Eureka, I think you've solved it! Makes perfect sense.

[OldCoot]

Originally Posted by csowers

Thanks for the input RamblerGuy and Daisy. In answer to your question, yes I did have a roaring flame for the entire 15-20 minutes. I didn't realize the thermostats were separate. Eureka, I think you've solved it! Makes perfect sense.

There is also a reset for the electric and the gas.