RV News RVBusiness 2021 Top 10 RVs of the Year, plus 56 additional debuts and must-see units → ×

Go Back   Keystone RV Forums > Keystone Fleet | Keystone RV Models > Travel Trailers
Click Here to Login

Thread Tools Display Modes
Old 09-14-2019, 08:58 AM   #1
Junior Member
Join Date: May 2019
Location: Minneapolis
Posts: 5
Dometic furnace issue

Bought a 2019 Cougar Half-ton 31BHKWE last October from a dealer in Oregon.
We had it shipped to our home state Minnesota and immediately placed it in winter storage. When we finally got to use it in May, it was still chilly enough that we needed to use the furnace. On the third weekendof use, the furnace (Dometic model DFMD35) went out. The furnace would try to start and shut off after 30 seconds due to not igniting. Brought it to a Keystone authorized service center in Minnesota as it was still under the factory warranty. They replaced the igniter and main circuit board.

We didn't need to use the furnace all summer until the last couple nights. It worked fine until this morning, and it's doing what it did before. Fan turns on to begin the process, shuts after after 30 seconds because of what I assume to be an ignition failure again. The furnace is very difficult to access in this model of Keystone as it's located under the rear bunkbed. There is no easy way to see the LED display that I assume is flashing a diagnostic code.

I do plan on bringing the RV in again before the factory warranty expires and I feel like they're just going to replace the igniter again, which doesn't remedy what I think is going to be an ongoing problem withut changing something. I am guessing that due to the design of this RV model and the furnace location, it may not be getting enough combustion air. I'm just curious if anyone else has had a similar issue with this model furnace and what you might have done to successfully address the problem. Is it truly just a lack of combustion or return air, or is there something else that should be considered? Thank you in advance!

Krogenov is offline   Reply With Quote
Old 09-14-2019, 09:04 AM   #2
Senior Member
KeithInUpstateNY's Avatar
Join Date: Feb 2017
Location: Potsdam
Posts: 319
The first thing I would check is the air intake and exhaust for insect nests. My brother had a similar problem after wasps nested in one of them while his trailer was in storage. They do make an insect screen to cover the intake and exhaust. Good luck.

2015 Bullet 220RBI
2019 Chevy Colorado extended cab V6 3.6 liter
KeithInUpstateNY is offline   Reply With Quote

dometic, furnace

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
Forum Jump

Powered by vBadvanced CMPS v3.2.3

This website is not affiliated with or endorsed by the Keystone RV Company or any of its affiliates in any way. Keystone RV® is a registered trademark of the Keystone RV Company.

All times are GMT -8. The time now is 08:38 PM.

Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2021, vBulletin Solutions, Inc.