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Old 05-07-2016, 07:00 PM   #1
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water heater issue

hi there,

I think I have an issue with my water heater. Was working fine on our last camping trip, but stopped after a day. I seem to have blown my thermal cutoff fuse (I overrode it and the unit works). In checking the function, I do have flames in the right place, but from time to time I noticed it flames in the front area (circled in yellow in the picture). That doesn't seem right. Any advice on how to fix it?

I don't notice any obvious blockages (critters and such).
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Old 05-07-2016, 08:44 PM   #2
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It appears that the air shutter is way too open. Try loosening the little screw and closing the gap a little. If I recall correctly my manual specs. 25" or less opening of the shutter.
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Old 05-08-2016, 04:05 PM   #3
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aha. I'll give that a shot. Thanks for the advice!
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Old 05-08-2016, 05:58 PM   #4
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You should also check your propane pressure, or have it checked. I made a manometer (Google is your friend) and found that my pressure was WAY low and dropped even further when the furnace came on.

In order to get a good flame, I had to open the air shutter too far. Low propane pressure could cause the flame to recede to the shutter.

You should have 11" water column (about 1.5 psi) at the heater with two other appliances running. I tried to adjust my regulator (2002 vintage) and it went from WAY low to WAY high. I replaced the regulator.

Al
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Old 05-09-2016, 12:00 PM   #5
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I may try that as well.

I ended up disassembling the unit and found a tiny (very dead) spider in the tube that I couldn't see when it was installed. Seems to work fine now.

Thanks for the advice.
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Old 05-09-2016, 12:20 PM   #6
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Quote:
Originally Posted by btowntincan View Post
I may try that as well.

I ended up disassembling the unit and found a tiny (very dead) spider in the tube that I couldn't see when it was installed. Seems to work fine now.

Thanks for the advice.
Yep, that would have been my first advice if I had gotten to this question a little earlier. Very typical of spiders and their webs in the tube. It's surprising how little debris in that tube will interrupt the proper flow of gas and air. It looks clean but once you disassemble the tube you will see the problem.

Jack
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