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Old 05-30-2020, 08:13 AM   #1
maccam1
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hot water tank

hello all

im having a problem when putting my hot water tank on propane.
always make sure the lines are purged first,turn the propane on,and at times
it will work for a day or two,other times it may continue to go out.
removed the cover on the outside everything looks clean,dont see any cobwebs
any suggestions

thanks
mark
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Old 05-30-2020, 08:44 AM   #2
JRTJH
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Have you checked all the plugs on the control board to make sure they are clean and securely connected ??? Don't forget to pull off the black rubber plugs in the upper left hand corner and check the connections on the thermostat/limit switches as well.
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Old 05-30-2020, 09:06 AM   #3
NH_Bulldog
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This is an issue I just had here: https://www.keystoneforums.com/forum...879#post392879

Your brand/model may be different. Mine is Dometic/Atwood, but it seems to be a common problem regardless of brand.
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Old 05-31-2020, 06:14 AM   #4
maccam1
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ok i found the control board
its clean,connections are secure
did not find any burn marks on back(as ive seen in videos),howvere there is no green
light to show that there is power,but i did get a little jolt.
also removed the black rubber plugs ane evrything is clean in there

im just hopeing that i didnt have stink bugs that have gotten in on the outside????
still keeps shutting off after about 5 minutes.restart lights back up goes out again

any other solutions,would be appreciated
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Old 05-31-2020, 06:25 AM   #5
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If it "runs and gets hot then shuts off after about 5 minutes and won't relight" I'd suspect the thermostat/limit switch. There are two, one for 120 VAC operation of the electric element and the other for 12VDC operation of the LPG burner/system. I'd change out the 12VDC thermostat/limit switch. If that doesn't fix it, next is to replace the control board.

It's apparent that the ignition system is operational, the water heater lights, runs for a while then stops, so it's probably something to do with the temperature control part of the water heater. When it gets to a certain temperature, it shuts off (probably working as it should) but then as the water cools, it doesn't relight, leading me to think it's a thermostat problem, since it will "relight, but goes out again.
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Old 05-31-2020, 07:04 AM   #6
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Can you see if the igniter is in the flame path? The gniter is also a flame sensor and if it doesn’t get hot enough it will shut it down.
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Old 05-31-2020, 07:13 AM   #7
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Quote:
Originally Posted by NH_Bulldog View Post
Can you see if the igniter is in the flame path? The gniter is also a flame sensor and if it doesn’t get hot enough it will shut it down.
Worth checking, but from the statement, "Sometimes it works for a day or two, then won't light" I'd suspect the flame sensor/ignition system is working OK.
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Old 05-31-2020, 07:53 AM   #8
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Thanks for everyones help
Now its been fine for almost 2 hours
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