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HVAC, Air Conditioners, Aqua Hot, Primus, Webasto, Chassis Heaters, Furnaces and Water Heaters Questions and information about the wide variety of Heating and Air Conditioning as well as Water Heater systems available are discussed here.

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  #11  
Old 10-12-2015
jyclegg's Avatar
jyclegg jyclegg is offline
Campground Owner
 
Join Date: Jan 2008
Location: Maggie Valley
Posts: 1,430
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Thank you Shane. I was just making noise. I have been into mine a few times. Most often just to adjust the ignition. I like the motor repair. Overall very nice repair. It is a pain to pull them all the way out! We use ours pretty hard. No Aqua Hot, and about 20 days of skiing per year. Maybe we will see you at WOG. Trying to get there.
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Jon Clegg
1988 WB40PT "Paradise"
Cross Creek RV Park, Maggie Valley NC
www.xcreekrv.com
35°31'08.6"N 83°03'38.8"W
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  #12  
Old 10-12-2015
79Ranger 79Ranger is offline
Redneck quadder
 
Join Date: Oct 2014
Location: Westlock
Posts: 270
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Thanks for the kind words. Got it all back together today and installed.
Now have a problem, go figure.
It continually fires the ignitor....I checked the repair manual and it says to check the high voltage lead and the flame sensor/ignitor.

I'm leaning towards a board.
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Duncan
Alberta
1988 XXV 40WB
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  #13  
Old 10-12-2015
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DTW1086@cox.net DTW1086@cox.net is offline
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Join Date: Jan 2009
Location: Mesa,
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Default Clean the Burners?

Great write up and great pics as well. One thing I didn't see mentioned or pictured is sleaning the burner slots. Maybe the later models like you have use different butners, but on the older units with cast iron burners the slots tend to get clogged with carbon and rust. A hack saw blade makes a good tool to clean them out.
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Dave Ward
Mesa, AZ
1980 FC 31 SB

THE SHORT BUS
(She's Just a Little Slow)
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  #14  
Old 10-12-2015
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Rose Mary Rose Mary is offline
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Join Date: Jan 2008
Location: tenmile oregon
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thanks for the write up and photos
This fix was put at head of my list when I was over at the coast last week.
I will be pulling the galley furnace to attempt a fix. Your step by gives me a better idea of how to do this.
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Rose Mary
82 turbo FC 35
JP's White Bird
SW Oregon
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  #15  
Old 10-13-2015
mynavion mynavion is offline
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Join Date: Dec 2007
Location: Stockbridge
Posts: 2,402
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Quote:
Originally Posted by sfedeli View Post
There will be a Suburban Furnace workshop at Pine Mountain next week. You pull it, we'll try and fix it. (I don't do cat / dog hair, dust bunnies or fossilized Cherrios crawling around the floor of someone else's bus) We will have LP, a 12V supply and a limited number of parts for testing. Coachcraft is only a few miles down the road and normally has a supply of new parts.
Shane,

I finally got around to pulling my kitchen furnace. Do you want a unit to do the demo with?
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John Stiles
1980 33FC
"My Navion". SOLD
Stockbridge, GA
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  #16  
Old 10-13-2015
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sfedeli sfedeli is offline
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Join Date: Jan 2008
Location: Hershey
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Sure!! The older ones with the cast iron burner assembly are delightfully simple... I'm sure we'll get to the bottom of why its not working and hopefully get some heat for you.
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Shane Fedeli
85PT40
Hershey, PA

"Savor the wine of youth, for it is a drink that can be consumed only once”
shanefedeli@gmail.com
717-645-4912
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  #17  
Old 12-15-2015
flyingjunebugs flyingjunebugs is offline
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Join Date: Jan 2011
Location: Anchorage
Posts: 268
Default Suburban Furnace fan running when thermostat "off".

Hi Folks,
Have the same model furnace in the 87 FC.
When the inside of the FC gets down to like 50F degrees, thermostat "off", the fan will start running. Turning the LP heat switch on the pilots instrument panel to "off", will kill the fan.
See that "Dinosaur Electronics" has a replacement control board P/N UIB L, for $78.88, do you guys think this would fix the problem?
Bruce
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Bruce Junes
Anchorage, Alaska
1987 35 FCSB “SOLD”
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  #18  
Old 12-15-2015
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sfedeli sfedeli is offline
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Location: Hershey
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The fan will not run unless power is getting to the unit from the thermostat. I don't think it's your control board. Sounds like there may be another thermostat somewhere set to "on"....OR this thermostat is not wired correctly.
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Shane Fedeli
85PT40
Hershey, PA

"Savor the wine of youth, for it is a drink that can be consumed only once”
shanefedeli@gmail.com
717-645-4912
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  #19  
Old 12-15-2015
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gcyeaw gcyeaw is offline
Gardner
 
Join Date: Dec 2007
Location: Ridgewood
Posts: 8,921
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On my thermostats there is a tab on the lower left that turns off the thermostat power (moves left and right). I assume your thermostat is turning on around 50 degrees so this switch will disable it. Also turning off the LP on the dash disables the propane heater thermostats.
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Gardner Yeaw
86 PT-36 Golden Memories
83FC35 SB $IXTEEN TON$ SOLD
78 FC 33 Happinest (Sold)
Ridgewood, New Jersey
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  #20  
Old 12-15-2015
flyingjunebugs flyingjunebugs is offline
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Join Date: Jan 2011
Location: Anchorage
Posts: 268
Default Heater malfunction.

Thanks for the replies.
The thermostat, was my first troubleshooting.
The switch on it, in any position, the fan still ran.
Removed it from the wall, above the booth table and took all the wires off, the fan still ran.
So thinking the control board has a temperature sensitive part that fails. Like a dried out capacitor on the control board.
Are the newer versions of this furnace, a direct fit? Wondering if I should get a furnace from a RV surplus place and just replace it. Could keep the broken one for parts.
Bruce
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Bruce Junes
Anchorage, Alaska
1987 35 FCSB “SOLD”
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