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04-22-2017, 05:54 PM
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#1
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Senior Member
Join Date: Sep 2015
Posts: 860
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2801 Furnace problems
I'm on my first trip of the year and my furnace won't light in my 2801qs. It's a suburban with a digital thermostat. Last year it worked fine. I've been through the procedure in the manual a few times which is shut of the gas and run the blower.
But now when I turn on the furnace the air conditioner comes on as well and the furnace is trying to light but quits.
I've got gas to the stove, fridge, and water heater but the tank was completely empty this spring when I filled it I think maybe the vent was loose and the -30 temperatures probably didn't help.
Any help would be appreciated it's down to zero tonight lol.
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Brian
2015 Forester 2801QS GTS
TOAD-Hobie Mirage Pro Angler 14 kayak and Yamaha Zuma 50cc scooter on a custom trailer.
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04-22-2017, 06:02 PM
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#2
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Senior Member
Join Date: Feb 2017
Location: SW Ohio
Posts: 1,670
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The AC is probably just the thermostat fan set to on instead of auto.
Is the furnace at the end of the propane run? If so turn the furnace off wait a minute and try again, maybe a couple of times.
Is your battery voltage good?
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Almost not an SOB
Artic Fox 3018 5th Wheel - on order
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TV 2017 F150 6.5' bed 3.5 Eco-boost Max tow 1800lbs payload
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04-22-2017, 06:15 PM
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#3
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Senior Member
Join Date: Oct 2013
Location: Florida
Posts: 1,363
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I'm sure you checked but since first trip of year did you check the entire furnace air / gas tube for possible spider web blocking gas
__________________
2016 Forester GTS 2801QSF
2011 Jeep JK Toad
Habitual RV Modifier
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04-22-2017, 06:45 PM
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#4
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Senior Member
Join Date: Sep 2015
Posts: 860
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Thanks guys I'm plugged into 30 amp, but I didn't check for spider webs. I'll have to check the manual I haven't done it before.
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Brian
2015 Forester 2801QS GTS
TOAD-Hobie Mirage Pro Angler 14 kayak and Yamaha Zuma 50cc scooter on a custom trailer.
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04-22-2017, 08:34 PM
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#5
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Senior Member
Join Date: Jan 2017
Location: Savannah
Posts: 791
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It's a good idea to get some screens for the vents on your furnace, water heater and fridge if you don't already have them. I've read some ugly stories about insect infestation of those appliances and personally had a huge wasp nest in the water heater when it was unused for a couple of months. Just Google RV vent screens. I got mine from Amazon.
Hope you get it going.
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Kirk
2017 Forester 3051S
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04-22-2017, 10:06 PM
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#6
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Senior Member
Join Date: Sep 2015
Posts: 860
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I'll have to check them out thanks, I'm still wondering why the AC comes on too when I have it set to furnace. It's never done that before.
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Brian
2015 Forester 2801QS GTS
TOAD-Hobie Mirage Pro Angler 14 kayak and Yamaha Zuma 50cc scooter on a custom trailer.
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04-22-2017, 10:11 PM
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#7
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Senior Member
Join Date: Jan 2017
Location: Savannah
Posts: 791
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Quote:
Originally Posted by Tombsy
I'll have to check them out thanks, I'm still wondering why the AC comes on too when I have it set to furnace. It's never done that before.
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Check your thermostat to be sure that the fan setting is set to auto instead of on.
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Kirk
2017 Forester 3051S
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04-22-2017, 11:26 PM
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#8
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Senior Member
Join Date: Oct 2013
Location: Florida
Posts: 1,363
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Yes AC fan should be on auto.
__________________
2016 Forester GTS 2801QSF
2011 Jeep JK Toad
Habitual RV Modifier
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04-23-2017, 12:23 AM
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#9
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Senior Member
Join Date: Sep 2015
Posts: 860
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This my thermostat, just has fan high or low no auto. When I run the fan now the ac comes too same as the furnace.
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Brian
2015 Forester 2801QS GTS
TOAD-Hobie Mirage Pro Angler 14 kayak and Yamaha Zuma 50cc scooter on a custom trailer.
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04-23-2017, 12:37 AM
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#10
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Senior Member
Join Date: Sep 2015
Posts: 860
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Found the auto fan but it's not on
__________________
Brian
2015 Forester 2801QS GTS
TOAD-Hobie Mirage Pro Angler 14 kayak and Yamaha Zuma 50cc scooter on a custom trailer.
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04-23-2017, 01:11 AM
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#11
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Senior Member
Join Date: Jan 2017
Location: Savannah
Posts: 791
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Oops, sorry, different thermostat.
I don't know where to go from here. Still seems it would have an auto mode.
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Kirk
2017 Forester 3051S
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04-23-2017, 01:13 AM
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#12
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Senior Member
Join Date: Jan 2017
Location: Savannah
Posts: 791
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Quote:
Originally Posted by Tombsy
Found the auto fan but it's not on
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What happens if you turn it on?
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Kirk
2017 Forester 3051S
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04-23-2017, 01:17 AM
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#13
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2012 Solera
Join Date: May 2012
Posts: 1,822
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Press the bottom button until led at fan lights. Then press + or - until display shows "au" (auto). Press bottom button to select furnace.
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JLeising
2012 Solera "S"
Calif SF Bay Area
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04-23-2017, 01:26 AM
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#14
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Senior Member
Join Date: Jun 2015
Location: Southern California
Posts: 2,087
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Sounds like you may have moisture in your propane tank causing the regulator to freeze up and limit the amount of propane. This happened to me in my old Winnebago and every time the outside temperature dropped below 45˚, the regulator would freeze up and no heat. But fridge worked.
Temporary fix is to pour warm water over the plastic regulator cover. Permanent fix if this is the issue was to have methanol injected into the tank when refilling. That removes the moisture.
__________________
2004 Winnebago Minnie 22e(went to a nice family Oct 3, 2015)
2016 Forester 2701DS (Aug 31, 2015)
2017 Camping 12 trips 38 nights
2018 Camping 10 trips 38 nights
2019 Camping 6 trips 19 nights
2020 Camping 0 trips Cancellations 6
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04-23-2017, 06:22 AM
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#15
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Senior Member
Join Date: Feb 2013
Location: Chagrin Falls, Ohio
Posts: 3,225
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Quote:
Originally Posted by JLeising
Press the bottom button until led at fan lights. Then press + or - until display shows "au" (auto). Press bottom button to select furnace.
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X2, must be set to "AU"
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2017 Salem Villa Estate 395RET-
2011 Coachmen Freedom Express 295RLDS- Sold
2015 F-250 FX4
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04-25-2017, 10:59 AM
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#16
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Senior Member
Join Date: Sep 2015
Posts: 860
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2801 Furnace problems
I have the fan set to aux that solved the ac coming on.
I think we might be on the right track with regulator freeze up. I lit a burner and tried the furnace and the burner just about went out. I'm on 30 amp and not using propane for anything else. Tried the oven the other night and couldn't get it above 350.
I poured hot water on the reg but no luck yet hopefully it will warm up here.
Thanks for the help everyone I think we're on the right track.
Time to fish
__________________
Brian
2015 Forester 2801QS GTS
TOAD-Hobie Mirage Pro Angler 14 kayak and Yamaha Zuma 50cc scooter on a custom trailer.
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04-25-2017, 11:29 AM
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#17
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Site Team
Join Date: Oct 2014
Posts: 15,243
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Have you recently filled the propane? Are other propane appliances working? If the propane lines are empty ( after refilling propane or running appliance with tank off) and you turn on the tank valve quickly, you can activate the free flow prevention valve. If this happens, turn off propane, Let sit for a minute then turn it on very slowly until you hear propane flow. Stop and wait two to three minutes for lines to charge. You can then open valve all the way.
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2015 Freedom Express 248RBS
TV 2015 Silverado HD2500 Duramax
TST Tire Monitors
Honda 2000I + Companion
2 100W solar panels
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04-25-2017, 11:50 AM
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#18
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2012 Solera
Join Date: May 2012
Posts: 1,822
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Quote:
Originally Posted by Tombsy
I have the fan set to aux that solved the ac coming on.
I think we might be on the right track with regulator freeze up. I lit a burner and tried the furnace and the burner just about went out. I'm on 30 amp and not using propane for anything else. Tried the oven the other night and couldn't get it above 350.
I poured hot water on the reg but no luck yet hopefully it will warm up here.
Thanks for the help everyone I think we're on the right track.
Time to fish
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Not enough propane flowing. Is your tank valve completely open? If yes, try Flybob's suggestion - turn off tank valve, wait a few minutes, barely crack open tank valve, wait a few minutes to pressurize lines, then open tank valve completely. Doubt you have regulator freeze up - while possible and does occur, that problem (water in the propane) is very rare. Possibly defective regulator (they're cheap and easy to change out).
__________________
JLeising
2012 Solera "S"
Calif SF Bay Area
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04-25-2017, 12:15 PM
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#19
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Senior Member
Join Date: Jun 2015
Location: Southern California
Posts: 2,087
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When I had the freeze up and finally found the reason, I removed the regulator and found it to be gummed up with white/yellow goo like butter. Probably from propane and water vapor mixture. Might start there.
__________________
2004 Winnebago Minnie 22e(went to a nice family Oct 3, 2015)
2016 Forester 2701DS (Aug 31, 2015)
2017 Camping 12 trips 38 nights
2018 Camping 10 trips 38 nights
2019 Camping 6 trips 19 nights
2020 Camping 0 trips Cancellations 6
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04-25-2017, 01:48 PM
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#20
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Just as confused as you
Join Date: Aug 2013
Location: south central Wisconsin
Posts: 5,108
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Quote:
Originally Posted by Sagecoachdriver
When I had the freeze up and finally found the reason, I removed the regulator and found it to be gummed up with white/yellow goo like butter. Probably from propane and water vapor mixture. Might start there.
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It is coming from the propane. Propane has water in it. If you ever looked at the exhaust pipe from a propane powered forklift while running you will see water dripping from it. Just like the tailpipe on your car or truck.
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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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