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12-09-2017, 02:37 PM
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#1
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Junior Member
Join Date: Nov 2017
Posts: 5
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Furnace issues
Furnace will turn on in 2008 Rockwood, but after a few minutes it will only blow cool air or shuts off. Replaced the switch, and its still doing the same thing.
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12-09-2017, 03:01 PM
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#2
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Scoundrel
Join Date: Feb 2017
Location: Montrose, Colorado
Posts: 2,786
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Is propane turned on? Also, low battery voltage will not allow the furnace to light.
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12-09-2017, 03:10 PM
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#3
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Junior Member
Join Date: Nov 2017
Posts: 5
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Yes propane is on. New battery and new converter. Have purged the system also.
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12-10-2017, 08:29 AM
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#4
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Member
Join Date: Jan 2014
Posts: 333
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I am not sure but just chiming in to help. On most flame heat source furnaces or heaters they have a thermocoupler attached near the flame to sense that a flame is present so it's not just dumping propane without burning it. If that is broken or damaged or covered in a oxidation .... The propane will be shut off if it doesn't 'sense' a flame, even if a flame is present.
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2018 Rockwood Signature Ultralight 8329SS
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12-10-2017, 10:11 AM
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#5
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Senior Member
Join Date: Mar 2007
Location: Nova Scotia, Canada
Posts: 111
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Agree it may be your thermocoupler some tines called a Flame Sensor, just do a search on Youtube how to check.
Quote:
Originally Posted by ChibullsAN
I am not sure but just chiming in to help. On most flame heat source furnaces or heaters they have a thermocoupler attached near the flame to sense that a flame is present so it's not just dumping propane without burning it. If that is broken or damaged or covered in a oxidation .... The propane will be shut off if it doesn't 'sense' a flame, even if a flame is present.
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12-10-2017, 07:07 PM
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#6
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Senior Member
Join Date: Aug 2012
Location: Deland, Florida
Posts: 354
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On my previous travel trailer I had the same problem. A small insect had died in the propane orfice. we were on the road and called a mobile repair service. He stated this was very common.
the way he diagnosed was he cupped his hand over the exhaust restricting the small amount of unburned propane that was flowing and it ignited.
After that I put insect screen on but not sure how much that really helps.
The opening in the insect screen is much larger than the orfice size.
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12-11-2017, 12:11 AM
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#7
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Just as confused as you
Join Date: Aug 2013
Location: south central Wisconsin
Posts: 5,108
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I would check for bugs, spiders, cob webs, dust, dirt or soot. That is a common problem. use an air compressor or a leaf blower to clean the tube. Beware any foreign material will blow out the exhaust end of the tube.
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2014 Flagstaff 832IKBS Classic Super Lite
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12-11-2017, 09:43 AM
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#8
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Junior Member
Join Date: Jul 2012
Posts: 15
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Quote:
Originally Posted by JOBE1
Furnace will turn on in 2008 Rockwood, but after a few minutes it will only blow cool air or shuts off. Replaced the switch, and its still doing the same thing.
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Try shutting the furnace off at the thermostat and shut the battery off at at the battery disconnect shut off the shore power and wait 15 minutes. That should reset the furnace controls.
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12-11-2017, 10:05 AM
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#9
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Just as confused as you
Join Date: Aug 2013
Location: south central Wisconsin
Posts: 5,108
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Being that the OP has a 2008, I doubt it has the digital thermostat. Analog thermostats don't have a reset function.
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Richard & Jill
2014 Flagstaff 832IKBS Classic Super Lite
2018 Silverado 1500 Crew Cab Z71 4WD All Star Edition
Camping since 1989, Seasonal since 2000.
Car Shredder Op/Tech, Scrap Metal Recycling - retired
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12-11-2017, 10:44 AM
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#10
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Senior Member
Join Date: May 2017
Posts: 5,712
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#1...does it light ? (Spark igniter) (Blocked gas orifice)
#2...If it lights...does it only burn for a few seconds ? (Flame Sensor) Dirty or broken. carbon build up will diminish sensitivity of sensor.
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12-11-2017, 11:01 AM
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#11
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Senior Member
Join Date: Aug 2013
Posts: 7,916
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X? fine sandpaper/green pad the flame sensor. Pull fuse on furnace to reset(or disconnect battery) to reset furnace(unit would need to be unplugged too).
Could be the thermostat is satisfied/not working....and at the same time the fan switch is stuck...or is that the switch you replaced? I think the sail switch is only for the gas function of the system. I would lean towards the control board being the issue. YMMV
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