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Old 07-29-2010, 08:54 PM   #1
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Atwood Water Heater problem

My 2001 WInnebago Brave has model GH6-8E Atwood water heater. When turned on the pilot light indication is normal and the burner comes on, however it will run for only about five minutes and then shut down. It cannot be restarted for about an hour after that. I have replaced the Thermal cut-off, ECO T-stat & thermostat, and the circuit board, No fuses or breakers are blowing.

I have put it to JustAnswer but I am locked out of the site for some reason.

Frustrated,

Phil
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Old 07-29-2010, 09:35 PM   #2
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Atwood WH

Phil your 6 gallon water heater has electronic ignition (and motor aid) and the ignitor for the propane is also the flame sensor that sends a signal back to the control board once the flame has started and then the board will the keep the gas valve open- if the sensor is dirty or corroded or defective usually it will not send a signal back to the board and then the gas valve shuts off after 5- 10 seconds of running but I have seen defective ones work for a short time and then cut out- try cleaning it first and setting the air gap and then if it still does the same thing then replacment is required - I would also check to make sure you have 12 volts to the WH and the propane system pressure to make sure its o.k. and also clean out the combustion chamber with compressed air while your at it -(wear safety glasses) since you replaced the c. board and the thermal c-off and the tstat and ECO switch check the ignitor next - you can check Atwoods website for the parts manual and wiring diagram and www.bryantrv.com -they have a service manual with diagrams, pictures and troublshooting guide.
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Old 07-29-2010, 09:43 PM   #3
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Quote:
Originally Posted by pcoopy View Post
...the pilot light indication is normal and the burner comes on
...run for only about five minutes and then shut down.
I suspect the controls are doing what they are supposed to

Quote:
I have replaced the Thermal cut-off, ECO T-stat & thermostat, and the circuit board, No fuses or breakers are blowing.
and that NONE of these items needed to be replaced.

something *else* is going on here...
like the water isn't being replenished fast enough and so it overheats
but the controls are doing their job
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Old 07-30-2010, 03:33 AM   #4
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Be sure the water heater has not been in by-pass, where there is no water passing through the tank. Open the pressure relief valve to see if there is any pressure. If not then it is in by-pass.
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Old 07-30-2010, 06:53 PM   #5
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Along with JustAnswer, RV Wizard hit the nail on the head. My bypass valve is labeled so that it looks like it is in normal when it is in bypass. Expensive fix replacing those good parts.(LOL) Thanks guys.

Phil
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Old 07-31-2010, 05:49 PM   #6
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You might want to check your ''high limit'' switch. It is a switch that turns your heater off if the water gets too hot. (this prevents explosion in some cases) If the high limit kicks out (or in) your water heater will not run until it resets its self and this is automatic. ..... as I remember the ''high limit'' is on the front of the heater but dont bet your lunch on that information.
if you use this information and it works for your.... YOU WILL HAVE TO PAY ME TEN CENTS the next time you see me... If it dont work for you ...I NEVER KNEW YOU.....
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God bless our vets .... ALL GAVE SOME ... SOME GAVE ALL
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Old 12-29-2010, 03:56 PM   #7
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What is by-pass mode or setting? It is not mentioned in the Atwood manual.
Thanks
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Old 12-29-2010, 04:44 PM   #8
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hi the buypass is not part of the wh itself it is added on when the unit is built it alows using antifreze to winterise the water system without filling the w/h but if you have cold water flowing from the hot focets the trouble is elceware lee
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