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Old 03-04-2014, 06:41 AM   #1
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1969 25' Tradewind
Ely , Minnesota
Join Date: May 2013
Posts: 40
Furnace won't shut off!

Ok. So we bought a 69 Tradewind. Almost everything that is touched seemed to need repair. That is why when the furnace worked with the flip of a switch I was extatic. The first time that is... Last summer we took it out on a 90 deg weekend and my 3 yr old decides it would be fun to play with the thermostat. Furnace worked just fine...except it wouldn't shut off. We were swealtering. I turned off the gas, but the blower continued to try and burn gas. I had to dig in the wall to cut the hard wire hot line to make it stop. Anyone have this happen to them? Suggestions? Looks like the furnace is not original. It's not the original furnace I don't think...Suburban NT24SP propane furnace. I have been looking around and seem to think it may be the limit switch or the fan switch. As they are north of $50, I would like to only replace the correct one. Any help would be greatly appreciated. Thanks!
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Old 03-04-2014, 06:57 AM   #2
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1981 31' Excella II
New Market , Alabama
Join Date: Sep 2011
Posts: 5,648
I would look at the thermostat first and go from there. According to the manual you either have a stuck thermostat contact or a bad gas valve that won’t shut off.

Here is a link to a manual that has some troubleshooting and repair info.

http://manuals.adventurerv.net/Subur...ice_Manual.pdf

Perry
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Old 03-04-2014, 07:35 AM   #3
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1969 25' Tradewind
Ely , Minnesota
Join Date: May 2013
Posts: 40
I already replaced the thermostat. Coincidentally, if the furnace is running and you disconnect the thermostat, it continues to run.
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Old 03-04-2014, 08:00 AM   #4
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1981 31' Excella II
New Market , Alabama
Join Date: Sep 2011
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Check for a short in the wire leading to the thermostat. If you unhook the thermostat at the furnace end then you know it is the thermostat or wire leading to it.

Perry
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Old 03-04-2014, 11:24 AM   #5
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1969 25' Tradewind
Ely , Minnesota
Join Date: May 2013
Posts: 40
Same result...keeps running.
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