Heater problems in 2004 jeep grand cherokee

Rmccloy
0

Asked by Rmccloy Mar 10, 2013 at 11:41 AM about the 2004 Jeep Grand Cherokee Special Edition 4WD

Question type: Maintenance & Repair

2004 jeep grand cherokee when i start it it it will not blow warm air.Soon as i start moving it blows warm air.Been happening for about a week.No smell or anything....heater core ,no smell.

2 Answers

dandyoun
73,155

Insure that your radiator, heater core and water levels are correct. and operating correctly. then check The dampers for the duct work of heating systems are controlled by vacuum. If at idle and car is at operating temp with heater on and you feel air coming out the vents but its cold and without touching any controls you start to drive and warm air starts coming out of them I would check for a vacuum leak going to the controller. As you drive faster the vacuum increases and will provide enough pressure to move the damper but at idle with the vacuum leak not enough pressure there to move it. This vacuum line will be coming from the intake thru the firewall to behind your heater controls. . Have to have heat in the heater core first.

4 out of 4 people think this is helpful.
Best Answer
DavidH25
Not Active

Only thing I can add to that excellent answer is I think water pump failing, the impellers, if plastic, can wear, albeit a 2004 might be a little soon for that, and when you increase the rps of the engine while driving, the pump spins faster and coolant flows better through engine and heater core. However dandy's post is more likely.

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

Search Jeep Grand Cherokee Questions

Jeep Grand Cherokee Experts

#1 Tom Demyan
Tom Demyan
Reputation 1,020
#2 thejeepdoctor
thejeepdoctor
Reputation 950
#3 tenspeed
tenspeed
Reputation 810
View All

Related Models For Sale

Used Jeep Wrangler"
723 Great Deals out of 48,439 listings starting at $1,800
Used Ford Explorer"
1,067 Great Deals out of 48,538 listings starting at $1,699
Used Toyota 4Runner"
338 Great Deals out of 10,110 listings starting at $2,500
Used Chevrolet Tahoe"
737 Great Deals out of 24,714 listings starting at $1,955
Used Jeep Liberty"
387 Great Deals out of 8,383 listings starting at $1,599
Used Dodge Durango"
327 Great Deals out of 18,913 listings starting at $1,695
Used Ford F-150"
2,374 Great Deals out of 103,455 listings starting at $1,300
Used BMW X5"
438 Great Deals out of 11,107 listings starting at $2,400
Used Ford Mustang"
706 Great Deals out of 35,204 listings starting at $995
Used Chevrolet Silverado 1500"
1,876 Great Deals out of 144,551 listings starting at $1,500

Used Cars For Sale

2015 Jeep Grand Cherokee For Sale
31 Great Deals out of 34,038 listings starting at $26,915
2014 Jeep Grand Cherokee For Sale
237 Great Deals out of 5,482 listings starting at $23,580
2013 Jeep Grand Cherokee For Sale
99 Great Deals out of 1,755 listings starting at $18,977
2012 Jeep Grand Cherokee For Sale
295 Great Deals out of 4,193 listings starting at $16,981
2011 Jeep Grand Cherokee For Sale
165 Great Deals out of 2,633 listings starting at $13,888