Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
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 10-19-2011, 11:37 AM   #1
Junior Member
Join Date: Oct 2011
Posts: 1
Cool dash air cuts out

I have a 2001 Georgie Boy Landau on a workhorse chassis. When I am traveling and using the dash air conditioning it works perfectly until a load is applied to the engine. For example as you start up a hill the dash air just quits working. The air blower stops completely. When you get on the other side of the hill and let up on the gas it starts working again. Anyone got any ideas.

trainwreck is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com 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 10-19-2011, 11:41 AM   #2
Registered User
Join Date: Mar 2011
Posts: 1,943
loosing the vaccumn. That's normal.

Perry White is offline   Reply With Quote
Old 10-19-2011, 11:49 AM   #3
Senior Member
GMRHost's Avatar
Vintage RV Owners Club
Ford Super Duty Owner
Join Date: Oct 2011
Location: Jasper, Missouri
Posts: 339
I do not know about your specific situation, but I know of a couple possibilities;
One could be that there is an AC cutout that was either factory installed or aftermarket for fuel conservation ... guess that leads to the question, has it always done this?

Second- and this is from my Superduty, not workhorse, experience; The diesel SDs have a vacuum pump that operates all of the "doors" in the cab air system- if it fails, it defaults to defrost (but you said the blower stops, so that must not be it)

Hope this was more than totally useless... also, we do have a "Workhorse" subforum that you might look up and post there... just a thought
Tom - Retired OTR 20 years 2 million mile club - 1984 Diamond Maxi
I love everybody! Even some above ground!
GMRHost is offline   Reply With Quote
Old 10-19-2011, 04:19 PM   #4
Junior Member
ocn's Avatar
Join Date: Dec 2010
Posts: 28
just had a similar issue with my 2010 Workhorse chassis RV. Dash a/c appeared to have stopped working but it had defaulted to the defrost mode. The vacuum line to a vacuum canister on the upper left in the engine bay had come off. Put the line back on and problem solved. If this is a new problem, then a vac leak is a good bet
Greenville, SC
2011 Georgetown 351DS
ocn is offline   Reply With Quote
Old 10-20-2011, 03:54 PM   #5
Ford Super Duty Owner
Join Date: Aug 2011
Location: Eastern Ohio
Posts: 42
AC on hard pull

I have a very similar problem on my MH, Ford 460 gaser. whem I'm on a hard pull the AC cuts out ,the fan slows down and warm air comes out. it's
a real pain. i did talk to my mechanic about it he siad he would look at it
but at $60.00 a hour I'm hopeing someone has a real answer. I have a 1998 airbus with only 38,000 miles on it.
redtop is offline   Reply With Quote
Old 10-21-2011, 10:06 AM   #6
Junior Member
ocn's Avatar
Join Date: Dec 2010
Posts: 28
If you don't have a vacuum tank in the system it probably isn't holding the vents open on long wide open throttle runs. Adding a tank isn't hard and you could probably find one in a bone yard off a car or truck. Many turbo powered vehicle use them.

If it is a new problem, then a leak has developed someplace in the system.
Greenville, SC
2011 Georgetown 351DS
ocn is offline   Reply With Quote
Old 10-21-2011, 10:34 AM   #7
Senior Member
doc's Avatar
Appalachian Campers
Join Date: Sep 2002
Location: Dixie !! (north Georgia) USA
Posts: 2,839
Don't know about MH, but that was a standard on one of the many cars I have had over the years. A PIA also!
doc is offline   Reply With Quote
Old 10-21-2011, 05:58 PM   #8
Senior Member
Ford Super Duty Owner
Join Date: Dec 2009
Location: Mcdonough, Ga.
Posts: 3,969
The next time it happens, have someone feel at the windshield defrost outlets. You will find the air is coming out here. This is a safety feature. It is to insure that if you lose all vacuum, your windshield will stay defrosted. Your system has a vacuum tank. start checking here. there will be the large supply line and a small outlet line. The large one is a common problem area. it splits at the end. Also check the tank. It is plastic and many times cracks. If both of these are OK check all vacuum lines for splits.

1998 Pace Arrow 35 ft. F53 Ford V10 2012 Honda Civic toad
15 year motorhome service manager. 3 popups....2 travel trailers....5 motorhomes....loved them all.
ga traveler 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
Dash air blower quit working sharring Newmar Owner's Forum 2 08-26-2011 08:27 PM
Dash air question... Lowhorn Winnebago Industries Owner's Forum 1 03-15-2010 09:10 AM
Dash air not working K Man Workhorse and Chevrolet Chassis Motorhome Forum 15 10-17-2009 01:28 PM
Dash Air and Cruise Control Problem becker Monaco Owner's Forum 7 07-07-2009 10:07 AM
Does your Dash Air work good in traffic jams? max49 Workhorse and Chevrolet Chassis Motorhome Forum 70 05-29-2006 06:14 PM

» Virginia Campgrounds

Reviews provided by

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 10:09 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.