Thread Tools Display Modes
Old 02-26-2017, 03:43 PM   #1
Junior Member
Join Date: Jun 2015
Location: Sulphur, LA
Posts: 9
Suburban furnace won't do anything

I have a Forest River Surveyor 33 RETS. 2016 and tried to use the furnace for the first time this weekend. It is controlled by a Dometic thermostat of which we have two. Dealer said which ever thermostat you turned furnace on with also controlled temperature. Tried both thermostats at different times and neither would turn on the furnace. I could switch the thermostat to fan or cool and they would work. Nothing on heat. Was getting gas flow to hot water heater and to stove top. Any suggestions as to what could be wrong?
GBeth is offline   Reply With Quote
Old 02-27-2017, 11:09 PM   #2
Join Date: Feb 2017
Posts: 52
If you are still under warranty then you should contact your dealer. Otherwise, the first step to a diagnosis is to determine if it is the t-stat or the furnace. There are four wires connecting the furnace to the coach. Red is 12v positive, yellow is ground(12v negative), and two blue wires that connect to the t-stat. Make sure you have 12v at the red wire. Then connect the two blue wires together. If the furnace comes on, then the issue is with the t-stat. If you still get nothing, then its most likely a problem with the furnace.
BooHyde is offline   Reply With Quote
Old 02-27-2017, 11:54 PM   #3
Senior Member
Join Date: Jun 2012
Posts: 10,907
Can you hear the fan start and hear it trying to light off? If so, then there may be air in the gas line. Try lighting the stove burners for a minute or two to purge the line.

If you don't hear the fan starting, then I'd say you probably have a thermostat or fuse problem.
1988 Coleman Sequoia - popup (1987-2009) - outlasted 3 Dodge Grand Caravans!
2012 Roo19 - hybrid (2012-2015)

2016 Mini Lite 2503S - tt (2015 - ???)
2011 Traverse LT, 3.6L, FWD
2009 Silverado 1500 Ext Cab, 5.3L, 4x4, 3.73
2016 Silverado 2500HD Dbl Cab, 6.0L 4x4, 4.10
rockfordroo is offline   Reply With Quote
Old 02-28-2017, 08:08 PM   #4
Junior Member
Join Date: Jun 2015
Location: Sulphur, LA
Posts: 9
Thank you! Will have hubby try this.
GBeth is offline   Reply With Quote
Old 03-01-2017, 07:12 PM   #5
Senior Member
Bluepill's Avatar
Join Date: Jun 2015
Location: Pensacola, FL
Posts: 1,645
2019 Coachmen Freedom Express 192RBS
2015 T12RBST Flagstaff Hardside

Disclaimer: The actual value of my "Two Cents" of advice varies just like a bitcoin.
Bluepill is offline   Reply With Quote

furnace, suburban

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Featured Campgrounds

Reviews provided by


This website is not affiliated with or endorsed by Forest River, Inc. or any of its affiliates. This is an independent, unofficial site.

All times are GMT -5. The time now is 09:10 AM.