Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  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 11-07-2012, 05:01 PM   #1
Junior Member
 
Join Date: Sep 2012
Posts: 1
Warm Dash Air "Not Hot"

I have a 2006 QDP 42 Tiffin Allergo Bus. Live in NC, so not real cold weather. The Dash air is warm but not Hot. I know in years past in the Dump Truck Bus. on a Cat Eng. you could turn a valve on the Eng. to have warmer air. Not sure on the 400 Cummins. Can anyone tell me if this is possible to warm up the dash heat? Thanks NC
__________________

__________________
0643AllegBus 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 11-07-2012, 05:11 PM   #2
Senior Member
 
palehorse89's Avatar


 
Newmar Owners Club
Join Date: Oct 2009
Posts: 7,731
Hello, I would think the air should be really hot just like in your auto's. The control valve that limits the hot coolant flow through the heater core might be opening fully.Try to locate that valve on your heater core hoses and see if it has a full range of travel when you turn the heat control up and down inside. Might have to have someone help you out so you can see what is going on. When you locate the heater hoses they should be hot enough that you won't hold your hand on them too long when engine is up to temp.
__________________

__________________
2000 Newmar MADP 4060, 350ISC, Spartan MM, IFS 2011 Jeep JK, M&G Braking, 2014 MTI 27' Hog Hauler, Wireless brake control, 2006Ultra & 1989 Springer
palehorse89 is online now   Reply With Quote
Old 11-07-2012, 05:27 PM   #3
Senior Member
 
wa8yxm's Avatar
 
Damon Owners Club
Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 22,792
There are several possible causes of "Warm but not hot" depending on the vehicle.

1: Thermostat (Engine t-stat) failed open, thus engine not reaching normal operating temp, thus heater not reaching normal operating temp. History: My girlfriends car on the coldest day in living memory had this problem.. I figured when I got to church it would be warmer inside... Wrong, Fr. is giving his state of the parish sermon "So thanks to Greyhound the boilers are paid for,,,, They don't work but they are paid for". FORTY BELOW your choice of F or C)

Second is a clogged or partially clogged heater core.

Next is a 2 parter, A: A faulty heater control valve not fully opening, (NOTE this may be caused by low air pressure or vacuum depending on the system) or "B" faulty air dam (A valve for the flow of air) same note.

Finally the air conditioner may be stuck on. (Clutch bearing siezed (happened to me) or short circuit)
__________________
Home is where I park it!
wa8yxm is offline   Reply With Quote
Old 11-07-2012, 05:54 PM   #4
Senior Member
 
Jim_HiTek's Avatar
 
Join Date: Nov 2011
Location: Full time RV'er
Posts: 1,655
On my Cummins, there are two valves, one on top of the engine and one below. In times past I've had them either vibrate closed, or an engine tech purposely turn them off while doing work and then not turn them back on again.
__________________
'02 Winnebago Journey DL, DSDP, 36' of fun.

Visit my RV Travel & Repair Blog at : http://chaos.goblinbox.com
Jim_HiTek is online now   Reply With Quote
Old 11-07-2012, 06:13 PM   #5
Senior Member
 
Bigd9's Avatar


 
Join Date: Jun 2012
Location: The Bluegrass State
Posts: 3,859
Also check the heater hose from front to back. There could be a pinch or a partial collapse in the hose especially where it goes over, under and around frame members. This could restrict the flow of engine coolant.
__________________
Good Luck, Be Safe and Above All, Don't Forget To Have Fun
Pete
2006 Fleetwood Discovery 35H, being pushed by a 2014 Honda CRV
Bigd9 is online now   Reply With Quote
Reply

Tags
dash



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


» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 05:46 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.