Go Back   DodgeForum.com > Dodge Vans & CUVs > Dodge Caravan
Sign in using an external account
Register Forgot Password?


Dodge Caravan The Dodge Caravan is the best selling mini van from Dodge. How many Dodge Caravan owners here at DodgeForum.com would agree? Discuss it now!

no heat in caravan

Reply
 
 
 
 
Thread Tools Search this Thread
  #1  
Old 12-24-2011, 01:35 AM
bill55az bill55az is offline
Veteran
Garage is empty, add now
 
Join Date: Mar 2005
Vehicle: 89 short bed 2wd
Location: AZ and Utah
Posts: 354
Default no heat in caravan

what is the most likely problem? I am suspecting control valve, but can't find it on a parts list at autoparts stores on line. It is my son's minivan, and he is bringing it to me, says he can't see a valve anywhere....
I am in northern Utah, its very cold here.....he is driving up from Phoenix with no heat, and apparently no brains. He knew it was acting up a month ago.
thanks...
he just got here, says if he takes it out of overdrive and gets the RPMs over 3500, he can get heat....
This ad is not displayed to registered and logged-in members.
Register your free account today and become a member on Dodge Forums!
__________________
AZ/UT snowbird
89 Dakota project
80 Diplomat coupe, near mint

Last edited by bill55az; 12-24-2011 at 02:02 AM..
Reply With Quote
  #2  
Old 12-24-2011, 03:55 AM
Cougar41 Cougar41 is offline
Record Breaker
Garage is empty, add now
 
Join Date: Feb 2011
Location: SoCal
Posts: 1,743
Default

Model year?
__________________
We took the time to answer your post. Please give us some time and post the fix. You'll help hundreds!

Last edited by Cougar41; 12-24-2011 at 04:07 AM..
Reply With Quote
  #3  
Old 12-24-2011, 04:07 AM
Cougar41 Cougar41 is offline
Record Breaker
Garage is empty, add now
 
Join Date: Feb 2011
Location: SoCal
Posts: 1,743
Default

You won't find a control valve on these vans from at least the 3rd generation (96-00) vans forward and probably even earlier than that. Coolant flows through the heater core all the time. An electrically actuated door in the HVAC unit controls how much hot air enters the cabin.

Bad thermostat? Are you seeing a slower than normal temperature gauge increase as the engine warms? Is the upper rad hose cool or only warm 10 minutes after starting?

I only learned of this restricter from this recent thread (linked below). This is all I know about it. No idea if your van has one. The last post on the second page may say it all.
http://dodgeforum.com/forum/dodge-ca...rol-valve.html
__________________
We took the time to answer your post. Please give us some time and post the fix. You'll help hundreds!

Last edited by Cougar41; 12-24-2011 at 04:14 AM..
Reply With Quote
  #4  
Old 12-24-2011, 10:13 AM
bill55az bill55az is offline
Veteran
Garage is empty, add now
 
Join Date: Mar 2005
Vehicle: 89 short bed 2wd
Location: AZ and Utah
Posts: 354
Default

Quote:
Originally Posted by Cougar41 View Post
Model year?
2005 dodge grand caravan....
__________________
AZ/UT snowbird
89 Dakota project
80 Diplomat coupe, near mint
Reply With Quote
  #5  
Old 12-24-2011, 03:49 PM
jeremywatson jeremywatson is offline
Registered User
2001 Dodge Grand Caravan
 
Join Date: Oct 2007
Posts: 18
Default

Think easier before you go to harder. Thermostat before something like a control valve. Cougar is probably on the right track. Had my thermostat go out. When I got it out it wasn't just stuck but had actually come apart.

Anyway, if your thermostat stays open all the time, then the coolant runs through your engine and back to the radiator so fast that it doesn't have time to heat up. Especially in cold weather, your thermostat needs to close periodically to stop the flow of coolant and to allow the coolant that is then stuck in the engine channels to warm up. When that coolant gets hot enough, the thermostat opens allowing cooler liquid into the engine and allowing the warmer liquid to move out. The hot liquid then moves out to your heater core under the dash where your a/c system blows air across it to heat the cabin before it moves back to the radiator to be cooled back off.

With a thermostat stuck open, the cooling system is basically free flowing, and in cold weather the coolant will simply stay chilled all the time. Cold liquid in your heater core means no heat in the cabin. Sometimes you'll notice a difference if the car is moving vs. not moving. While it's moving, there is air blowing across the radiator meaning the radiator works better and cools everything completely. But, if you've the engine is warm and the car is stationary, then no wind across the radiator and less cooling. In other words, if you start to get a little heat when you're stopped at a long red light, but it goes away when you start moving again, then that's another sign of a bad thermostat.

Pull your thermostat and take a look at it. Shouldn't take you 5 minutes even if you don't really know what you're doing. If that's your problem it's a cheap fix.

Good luck and merry Christmas.

Last edited by jeremywatson; 12-24-2011 at 03:54 PM..
Reply With Quote
  #6  
Old 12-24-2011, 04:05 PM
bill55az bill55az is offline
Veteran
Garage is empty, add now
 
Join Date: Mar 2005
Vehicle: 89 short bed 2wd
Location: AZ and Utah
Posts: 354
Default

thanks, new thermostat will go in soon, will let you know how it turns out.

I forget which car, but a few years ago I did find a thermostat had come apart completely...
__________________
AZ/UT snowbird
89 Dakota project
80 Diplomat coupe, near mint
Reply With Quote
  #7  
Old 12-25-2011, 09:38 AM
bill55az bill55az is offline
Veteran
Garage is empty, add now
 
Join Date: Mar 2005
Vehicle: 89 short bed 2wd
Location: AZ and Utah
Posts: 354
Default

well, no water in the overflow, and only about half in the radiator.....
there must be a leak somewhere, but we see no dripping on the floor...hope it isn't the water pump. I hate replacing water pumps on front wheel drive cars....thanks for the help....
__________________
AZ/UT snowbird
89 Dakota project
80 Diplomat coupe, near mint
Reply With Quote
  #8  
Old 12-26-2011, 11:25 PM
master tech's Avatar
master tech master tech is offline
Multi-section Moderator
Garage is empty, add now
 
Join Date: Apr 2007
Vehicle: Mits P/U , Dodge avenger(1996) .
Location: San Bruno ,Ca
Posts: 10,543
Leonard Pierce
Default

They are not that really that bad. Thats why you join this forum, everyone helps everyone.
__________________
Dodge Master Tech.
Reply With Quote
  #9  
Old 12-27-2011, 12:26 AM
Dthane62 Dthane62 is offline
Registered User
Garage is empty, add now
 
Join Date: Oct 2009
Posts: 9
Default

Our thermo went out 2 hours away from home when it was 6 degrees out side. That may have been the coldest I ever was in my life, and for sure was the coldest drive ever. That had to have been 3 or 4 years ago, and was in our 2001 GC. It has 144K on it now.
Reply With Quote
  #10  
Old 12-27-2011, 02:52 AM
bill55az bill55az is offline
Veteran
Garage is empty, add now
 
Join Date: Mar 2005
Vehicle: 89 short bed 2wd
Location: AZ and Utah
Posts: 354
Default

My son's minivan has given him a lot of little problems, egr system failing several times, and failing emissions, power door locks won't work for very long, have to keep resetting the computer by lifting battery terminals, leaking power steering fluid, a water pump, etc. but the engine and tranny keep on truckin'. A lot of the miles on the van are city miles from taking their oldest child to Phoenix Children's Hospital once a week for over 5 years for chemo, due to an inoperable brain tumor. She is hanging in there, tho, and is on a trial drug now that has been proven good at killing other kinds of tumors.
At 127K miles, their van is about due for replacement, but he hopes to get 2 more years out of it. By then he should have gotten a promotion to Asst. Principal and will be making enough money to get a new family car or truck or van. His other car is a 95 dakota and it has been very reliable considering its age. I am advising him to get a quad cab dakota. With 3 kids, it is just big enough for them to travel in...and a lot easier to work on after the warranty expires. I am getting too old for the hard repairs....
__________________
AZ/UT snowbird
89 Dakota project
80 Diplomat coupe, near mint
Reply With Quote
Old 12-27-2011, 02:52 AM
 
 
 
Reply




Thread Tools Search this Thread
Search this Thread:

Advanced Search

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

Forum Jump

Join DodgeForum
Advertising

Featured Sponsors
Vendor Directory
Our Sponsors
All times are GMT -4. The time now is 09:27 AM.

Internet Brands, Inc.


Contact Details & Emails