Free 7 Day Trial RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Monaco Owner's Forum
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 08-21-2016, 01:35 PM   #1
Junior Member
Join Date: Jan 2012
Posts: 7
dash air wont shift from defrost outlets to dash outlets

Hi I have a 2002 holiday rambler ambassador and I cant get the dash air to come out the dash outlets but it does come out of the defrost outlets. The damper doesn't seem to be shifting. The air operated vacuum device doesn't seem to be making much vacuum when I pull the line from vacuum tank there is very little suction on the line. Has anyone else had this problem and if so how do I fix it. Thanks Dwight
drrussell is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free! RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 08-21-2016, 01:40 PM   #2
Senior Member
BFlinn181's Avatar
Gulf Streamers Club
Join Date: Jan 2012
Location: Cincinnati
Posts: 19,927
That's the classic symptom of a loss of vacuum. The flaps are controlled by vacuum. If it's a gas powered RV, the vacuum comes from the engine. If it's a diesel, they don't produce vacuum so they have a small vacuum pump on the front bulkhead under the cowl. It may be an electric pump or an air-powered pump from the air system. Default to defrost is a safety feature, in a case of failure, at least the windshield is kept clear.

See if the vacuum is working, then trace through the vacuum hoses to find the leak or break.

Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
BFlinn181 is offline   Reply With Quote
Old 08-21-2016, 01:44 PM   #3
Senior Member
camperkids's Avatar
Join Date: Aug 2011
Location: Bel Air, Maryland
Posts: 253
Trace all your vacuum line there a good chance you have a broken or cracked line by the way you are describing the problem. Good luck and keep us in the loop.
Jim/Lois 1999 Newmar Mountain Aire MACA3797 F53 - V10
Bel Air, Maryland 5 Star Tuning & Air Lift Bags
camperkids is offline   Reply With Quote
Old 08-21-2016, 04:30 PM   #4
Senior Member
walt2137's Avatar
Monaco Owners Club
Join Date: Sep 2003
Location: Quitman MS
Posts: 2,967
Dwight I think you will have a air operated vacuum pump I know the Dyn does, they also used a 12 volt vacuum pump later so check in the gen bay.
Walt & Will
2000 Dynasty
2017 Ram Big Horn Crew C 4X4 w/ M&G
walt2137 is offline   Reply With Quote

dash, dash air

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
dash air/heat only coming out defrost jim d. Monaco Owner's Forum 12 09-03-2015 12:12 AM
Shift or Not to Shift BigAWB Class A Motorhome Discussions 30 09-05-2014 07:47 PM
ONLY dash air from defrost vents DadD45 MH-General Discussions & Problems 9 05-20-2008 04:47 PM
dash air blowing out of defrost vents? softballdad25 Workhorse and Chevrolet Chassis Motorhome Forum 5 09-03-2007 08:40 PM
To shift or not to shift Rick A Trailer Towing and Tow Vehicles Discussion 16 03-26-2007 02:04 PM

» Featured Campgrounds

Reviews provided by

All times are GMT -6. The time now is 08:01 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.