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Old 09-12-2015, 12:26 PM   #1
Senior Member
Fleetwood Owners Club
Ford Super Duty Owner
Join Date: Aug 2011
Posts: 103
Front furnace fan running though thermostat is off (and the gas)

So our '97 Fleetwood is just sitting and I come in the garage and hear a fan running. Turns out it is the front furnace blower...I look and the thermostat/temp control is off and was last week when I was in here with no fan running...so I fool around w/the switches on/off with the front thermostat but no avail - It's an Attwood...the gas is also off so it's running and attempting to fire...(glad the gas was off). So I take off the outside cover (wasps sure like it in there and found several abandoned nests) - and the fan switch is on (on the motor outside) so I switch it off but it keeps running...finally after dinking around for a while like this I go inside and switch to 'on' the rear furnace - it does not come on but at a certain point the front fan stops...so I turn off the rear furnace at the thermostat and after a few seconds the front furnace fan starts again...repeated this and it happened again...

Can anyone help? Is this a bad thermostat, some card on the furnace (I see a few), or what? For now I have pulled the red wire going to the micro-switch which for now has it stopped.

Thanks in advance for any help you can offer...!!!

1997 Fleetwood Southwind 35LS - Ford F53 Chassis - Life is a Journey and Everyone Should Enjoy Theirs
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Old 09-12-2015, 01:38 PM   #2
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Join Date: Sep 2015
Posts: 21
Pull the fuse on both, let them relax for 6 hours then try it again, sounds to me like the board is gone.

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Old 09-12-2015, 01:49 PM   #3
Senior Member
Fleetwood Owners Club
Ford Super Duty Owner
Join Date: Aug 2011
Posts: 103
Thank you Fred. I'm thinking these are 12-volt fuses you're referring to? ...the MH has been being stored much more than being driven the past 2 years and is plugged in most of the time (this year it was not used at all due to some non-timely illness) and the furnaces have not been on at all. I did just this past week though, pull it out and we 'mock' traveled in the yard to run the AC's and use the generator...so we used the thermostat but NOT the furnaces (gas remained off all year)...that makes me suspect that either the thermostat went bad (a wire?) or that by cycling through the slide-control it burned something out on the furnace controls (at the furnace?).
1997 Fleetwood Southwind 35LS - Ford F53 Chassis - Life is a Journey and Everyone Should Enjoy Theirs
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ace, fan, furnace, gas, thermostat

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