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 03-27-2011, 07:23 PM   #1
Junior Member
Join Date: Mar 2011
Posts: 1
hot air a/c

My 1999 itasca blows hot air when set on a/c. A short while ago the heater core failed and was replaced-now the a/c doesn't work. When i lift the instrument console I can see a valve that moves when I activate the a/c controls but hot air still comes out the vents. Are there other valves that could be problems and how do I find them?

davidrm 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 03-27-2011, 07:56 PM   #2
Senior Member
Join Date: Apr 2005
Posts: 310
There are also vacuum-operated doors in your dash heating/cooling system. A vacuum leak could cause these "blend doors" to be in the wrong position. I had a vacuum hose just fall off once, so it was a pretty easy fix, good luck, HarveyP

94 Holiday Rambler Endeavor LE

HarveyP is offline   Reply With Quote
Old 03-27-2011, 08:03 PM   #3
Senior Member
yudamann's Avatar
Join Date: Jun 2007
Location: Outer Banks NC
Posts: 141
Look for the linkage that moves the water valve actuator. When you slide the lever on the dash to cool position, the connecting linkage should close the water valve that allows hot water to the heating coil. Perhaps the link connection was not replaced after the work was done allowing hot water to flow continuously to the coil.
Outer Banks NC
2005 Allegro Bus 38 ft.
2004 Acura MDX toad
yudamann is offline   Reply With Quote
Old 03-27-2011, 08:04 PM   #4
Moderator Emeritus
TXiceman's Avatar

Vintage RV Owners Club
Texas Boomers Club
Oklahoma Boomers Club
Ford Super Duty Owner
Join Date: Aug 2000
Location: Full Time, TX Home Base
Posts: 17,139
Blog Entries: 21
You should see the actuators move the damper doors to close off the heater core. Some are cable operated, some are vacuum operated. Hopefully you can have access to all of the controls and dampers.

Amateur Radio Operator (KE5DFR)|Full-Time! - 2012 6.7L Ford Crew Cab Dually -2013 HitchHiker Champagne 38RLRSB - Travel with one Standard Schnauzer and one small Timneh African Gray Parrot
TXiceman 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
Hot air from vents when slowing down INSPECTORBOB Ford Motorhome Chassis Forum 9 12-04-2010 07:09 PM
Yet another DIY Cold Air Intake that is different than the rest. Now Improved! skitime Workhorse and Chevrolet Chassis Motorhome Forum 38 10-17-2010 06:47 PM
Dash Air Conditioning putting out hot air Knot-Flyn' Newmar Owner's Forum 19 08-19-2009 08:44 PM
Air bubbles in my hot water RickRinehart RV Systems & Appliances 7 07-27-2009 08:08 PM
Hot Air Rusty Bear Alpine Coach Owner's Forum 4 11-30-2008 10:45 AM

» 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 05:01 AM.

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