Thread Tools Search this Thread Display Modes
Old 12-09-2015, 07:00 AM   #1
2 Rivet Member
2012 27' FB Classic
Portland , Oregon
Join Date: Jan 2011
Posts: 25
Heater fan maintanence ?

Lately my furnace fan has developed a sound when the furnace cycles off.
Before you could not hear the rotation of the fan. Now it sounds like it is very lightly scrapping on something or that there is a bit of sand in the bearings.This sound is only during the last few revolutions before it comes to a stop at the end of its cycle when the heater shuts off. Does this simply need maintenance or is this an indication of something else? My 2012 Classic has a Atwood blower motor.
Any feedback would be welcome !
Airtrekker is offline   Reply With Quote
Old 12-09-2015, 08:00 AM   #2
Rivet Master
Currently Looking...
Mission , Texas
Join Date: Jun 2015
Posts: 836
Clean the fan and check the fan shroud.
If it were the bearings it would probably always be noisy.
More likely it is a little dirty and so possibly slightly off balance which is only noticeable as it winds down. Later the bearings go out.
nrgtrakr is offline   Reply With Quote
Old 12-09-2015, 08:02 AM   #3
4 Rivet Member
Ron A's Avatar
2018 23' Flying Cloud
Huntsville , Alabama
Join Date: Nov 2014
Posts: 250
I'm sorry I have not experienced the same problem, however, I'm sure someone will come along shortly that can assist. I have certainly learned a lot from the people on this forum.

Sent from my iPad using Airstream Forums
Ron A is offline   Reply With Quote
Old 12-09-2015, 08:05 AM   #4
2020 Classic 33
Box Elder , South Dakota
Join Date: Oct 2013
Posts: 1,708
Images: 1
May be that the sail switch is touching the fan blades. Easy check is to rotate the fan by hand. Typically this would be clockwise. One way to test is to turn off the reset switch when you have the outside cover removed, set the thermostat so that the furnace will come on and then you can turn it on and off with the reset switch while you listen/watch the furnace.
2020 Classic 33 Twin, 2019 Ram 3500 Longhorn, ProPride
ghaynes755 is offline   Reply With Quote
Old 12-09-2015, 01:15 PM   #5
New Member
2012 30' Classic
Ocala , Florida
Join Date: Oct 2013
Posts: 3
Mine was doing the same thing. I tried to adjust the noise out. Could not get it out. I was at JC and they replaced fan blade. The noise has not come back .
Kenaisalmon is offline   Reply With Quote
Old 12-14-2015, 09:04 AM   #6
2 Rivet Member
2012 27' FB Classic
Portland , Oregon
Join Date: Jan 2011
Posts: 25
Thank you !

Thank you one and all !!! This is all very helpful !
Airtrekker is offline   Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Fan-Tastic fan install Gordon Watt Roof Vents, Skylights & Fans 28 08-15-2011 11:41 AM
Fan-tastic Fan Installation With Photos Dabler Roof Vents, Skylights & Fans 9 09-09-2007 08:18 PM
Fan-Tastic fan??? definition needed hex Our Community 26 10-10-2002 02:17 PM
Fan-tastic Fan installation BobbyW Roof Vents, Skylights & Fans 4 06-17-2002 09:40 PM

Featured Campgrounds

Reviews provided by


This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.

All times are GMT -6. The time now is 12:24 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.