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Bear9350's avatar
Bear9350
Explorer
Jun 04, 2015

Water Heater not staying lit

Just purchased this trailer used this spring. I had some issues with the electrical but got that figured out. Now the water heater is giving me problems...

After de-winterizing I filled the water heater and lit it with no problem but it would stay lit for more than a feww minutes. I found out my pilot light wasn't very strong so I took that out and cleaned it. I then had a strong pilot light and had it placed properly under the thermal couple. Seemed to solve the problem for a couple of days.
After I used it to take a shower one day my wife told me a couople hours later she did not have any hot water. When I checked the hot water heater the pilot was out. I tried lighting it but could only get the pilot to light while I manually turned it to pilot. As soon as I let it return to on the pilot would go out. I know the thermal couple was getting hot enough that it should have stayed lit.
At his point I changed out the thermal couple. No change after replacing the thermal couple. I decided to order a new control valve. In the process of waiting for the control valve I switched to a full tank of LP as we were still running the furnace occasionally at night. Still no change. Pilot light would light but would die as soon as the pilot was released.
The new control valve arrived yesterday. I installed it and everything worked fine. Lit it around 4:30. Did dishes around 5:30 with plenty of hot water and both I and my wife took a shower around 10:00. This morning when I woke up the pilot light was out again. We still had hot water and I could feel the exhaust was still pretty warm so I think it just died recently. When I tried to re-light it again I could get the pilot to light with no problem but as soon as I released it from pilot it would go out.

Any ideas what is going on? Am I doing something wrong?

3 Replies

  • It sounds like you are doing everything right. Maybe try what MNRon says.

    Are you absolutely sure the pilot is blowing directly on the thermocouple in the right spot. They can be kinda finicky about that.

    I have had some luck lightly banging on the pilot tube with a pair of pliers. But, that is when the tube is plugged and you say you cleaned yours.
  • Is it windy? I once had a TT that I could not keep the water heater pilot light lit, it would constantly blow out. I had to make a metal shield sort of like an outside dryer vent over the water heater vents. Never had any more problems.
  • Sounds like you know what you're doing aligning the pilot with the sensor etc. We had a previous TT that I had problems with the water heater each spring it seemed. My solution each time was in cleaning the electrical blade contacts. I'd pull the blades out and scrape them with my knife and then reinsert. I believe the contact for the sensor was the one in question, but honestly it's been a few years and I think I probably just cleaned all of them I could find in the heater area. It took me a couple years of fighting the same issue before I figured out I just needed to clean them each spring, never had a problem after that.

    Good luck.