Bigfoot furnace blowing cold..... - Fiberglass RV


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Old 09-15-2014, 09:20 AM   #1
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Bigfoot furnace blowing cold.....

all of a sudden the furnace in my BF 17CB is only blowing cold air.....is there a "usual" problem with these units....

looking for a "been there, done that" answer...TIA
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Old 09-15-2014, 07:40 PM   #2
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What is the make and model of the furnace, and what troubleshooting have you done so far?

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Old 09-15-2014, 08:03 PM   #3
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Out of gas!
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Old 09-15-2014, 08:25 PM   #4
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Did you try it when plugged in vs. just on battery?
There is an airflow switch of some sort in there that has to be tripped and, in the case of a low battery or a sticky switch, it may not be closing.
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Old 09-15-2014, 09:14 PM   #5
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thanks, Dan....

a picture is worth a thousand words...(click on them for details)....twice today I got it to blow hot air (fire up) after I pushed what appears to be a circuit breaker located top left.....I'm guessing that's the culprit...but don't know much, like nuttin', about frunaces....

the button on this circuit breaker is kind of loose and it's operation is not "deliberate".... like what I would expect resetting a breaker.....TIA
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Old 09-20-2014, 08:14 PM   #6
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Your gas pressure could be low. Turn on your stove and check the flame.
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Old 09-20-2014, 08:30 PM   #7
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Circuit breaker, could be bad ignitor or fan or breaker. Electrosonic or similar store should have one. Maybe even big marine place
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Old 09-22-2014, 06:06 AM   #8
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The circuit boards fail also. They are similar to the water heater circuit boards. I keep a spare circuit board for my water heater and should get one for my furnace too.

You should print the service manual for it and keep it handy for trouble shooting.


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Old 09-22-2014, 08:58 AM   #9
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Unhook the wires and test the breaker with a meter for continuity or short the two wires to the resettable breaker and see if it comes on. The breaker may simply be worn out and not strong enough to hold itself closed.
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Old 09-22-2014, 09:10 AM   #10
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I think you're getting "warm".....;););)



it seems I have an intermittent problem (swell!)....I turned everything off and started up again....now I seem to have heat...will have to see if it happens again and how often.....it might have just been one of those "just shut it down and restart everything" situations.....everything has a "brain" these days....I've seen it happen with sno-cats and 25 ton rock trucks....add RV furnaces to the list maybe.... thanks
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Old 09-22-2014, 09:51 AM   #11
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Intermittent problems furnaces are not good... and I don't think a reboot is the answer on something without any sort of digital control system.

Can you post the actual model number and we can figure out what the "circuit breaker looking thing" actually is, it's not clear in the pic.
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Old 09-22-2014, 10:15 AM   #12
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Quote:
Originally Posted by Franswa View Post

I've seen it happen with sno-cats
mt. Washington???
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Old 09-22-2014, 01:45 PM   #13
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Yep, Rick's Ride...

this one on top
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Old 09-22-2014, 01:58 PM   #14
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Originally Posted by Franswa View Post
this one on top
Thought so! Nice pictures! I haven't been up to your mountain in a long time but I have had the pleasure of spending lots of time at World Cup races , working and staying with a number of Mt. Washington Marmots as your race course workers are known. Great group of guys. Especially enjoy their tradition of sharing on the mountain a little "Marmot water" as they call it at the end of a race day.

Back on topic - you should BTW be able to find a full service manual for your Atwood furnace on line should you continue to have problems with it.
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