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11-23-2013, 11:20 AM
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#1
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Junior Member
Join Date: Nov 2013
Posts: 8
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Furnace Blowing Fuse
Hi everyone, New to the RV world. Having trouble getting my furnace to turn on. I noticed the 12vdc fuse was blown, tried another and blew. Im guessing short on wire somewhere or locked up blower motor. Just bought this fifth wheel and don't know much about it. What would be next step to check?Where is the blower motor? Would appreciate all the help.
Thank you
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11-23-2013, 12:00 PM
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#2
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Senior Member
Join Date: Nov 2012
Location: X
Posts: 2,781
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Welcome to Forest River Forums!
The Fan is inside the furnace. It's all a self-contained unit. There are several documents for the furnace in the FRF library. Here's a link to the trouble-shooting guide to get you started. http://www.forestriverforums.com/for...do=file&id=119
I image the power to the furnace is connected thru a plug so the first thing to do is to unplug it at the furnace to see if the short is in the wires leading to the furnace or in the furnace itself. Good luck!
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11-23-2013, 12:05 PM
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#3
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Junior Member
Join Date: Nov 2013
Posts: 8
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Im gonna try it.
Thank You
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11-23-2013, 12:38 PM
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#4
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Junior Member
Join Date: Nov 2013
Posts: 8
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disconnected Ac out in furnace and still blows the fuse. How do u work on blower or squirrel cage?
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11-23-2013, 12:39 PM
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#5
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Junior Member
Join Date: Nov 2013
Posts: 8
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Wondering where the yellow/white wire coming off the fuse block goes to?
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11-23-2013, 12:43 PM
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#6
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Senior Member
Join Date: Sep 2013
Location: Idaho
Posts: 9,839
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Quote:
Originally Posted by Amos2208
Wondering where the yellow/white wire coming off the fuse block goes to?
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Would you care to explain this part?
__________________
2016 F350 6.7L LB CC Reese 28K 2014 Chaparral Lite 266sab
"Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety." 2014 19 days camping 2015 17 days camping201620 days camping
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11-23-2013, 12:48 PM
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#7
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Senior Member
Join Date: Nov 2012
Location: X
Posts: 2,781
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Quote:
Originally Posted by Amos2208
disconnected Ac out in furnace and still blows the fuse. How do u work on blower or squirrel cage?
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The furnace uses only 12v (and propane). Fuses in an RV are for 12v. Circuit breakers are for AC (120v).
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11-23-2013, 12:53 PM
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#8
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Junior Member
Join Date: Nov 2013
Posts: 8
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The fuse block has a 15 amp 12vdc fuse and the wire that is protected by the fuse goes behind the wall somewhere. Don't know if I answered your question.
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11-23-2013, 12:55 PM
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#9
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Junior Member
Join Date: Nov 2013
Posts: 8
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I would like to know how to get to blower motor?
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11-23-2013, 01:09 PM
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#10
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Junior Member
Join Date: Nov 2013
Posts: 8
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Ford Idaho, The Ac I was talking about is on the control module on the furnace. Now what the Ac does I don't know but it is AC Voltage.
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11-23-2013, 01:09 PM
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#11
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Mod free 5er
Join Date: Mar 2008
Location: Concord, NC
Posts: 24,702
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Quote:
Originally Posted by Amos2208
I would like to know how to get to blower motor?
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In most cases, you have to pull the entire furnace unit.
__________________
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11-23-2013, 01:30 PM
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#12
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Senior Member
Join Date: Sep 2013
Location: Idaho
Posts: 9,839
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Quote:
Originally Posted by Amos2208
Ford Idaho, The Ac I was talking about is on the control module on the furnace. Now what the Ac does I don't know but it is AC Voltage.
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I was wondering what you found with the I thought it came off or something.
__________________
2016 F350 6.7L LB CC Reese 28K 2014 Chaparral Lite 266sab
"Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety." 2014 19 days camping 2015 17 days camping201620 days camping
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11-23-2013, 01:36 PM
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#13
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Junior Member
Join Date: Nov 2013
Posts: 8
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Nothing so far, Im hoping someone comes thru with how to test the blower motor without taking the whole furnace out, don't know if there is motor wires easy to access.
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11-23-2013, 08:52 PM
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#14
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Senior Member
Join Date: Nov 2012
Location: X
Posts: 2,781
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Amos, let me summarize where I think we are on this.
You think the motor is at fault. From what I see in the Suburban manuals, unless your model is one with an external access door, you will have to remove the furnace from the RV to access the motor as others have said. You should probably post the furnace model number to get better advice.
Unless you have a "park model" RV, they don't normally use 120v AC. You are blowing a 12v fuse so you need to disconnect all of the wires to the furnace to make sure it's that which his blowing the fuse. Just disconnecting some 120v wires isn't sufficient.
Does anyone else have any better ideas?
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11-23-2013, 09:13 PM
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#15
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Member
Join Date: Apr 2011
Location: Roanoke, VA
Posts: 99
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I had a fuse blowing everytime I tried to turn on the furnace. turned out to be a bad thermostat causing it. Replaced the thermostat and no problems since.
__________________
 2006 Chevy Silverado 2500HD
2012 Rockwood 2902SS
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12-28-2013, 11:25 PM
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#16
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Junior Member
Join Date: Jul 2011
Location: Southern New Jersey
Posts: 19
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Does the A/c run with the blown fuse for the heater ? There are 12 volt relays in the a/c that work with the heater These relays control the 110 volts to the A/C. You can jump the Heater blower motor by itself If it runs there is limit switch in the heater along with a sail switch to check. You could to run a direct 12volt line to the heater to see if it runs If it does Then there a problem in the wall or at the convertor 12 volt panel
__________________
1999 RockWood 2505
2007 Dodge Ram Quad Cab Hemi
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