Heater problems in 2004 jeep grand cherokee

Asked by 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

107,605

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.

5 out of 5 people think this is helpful.
Best Answer

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 inuevafreak
inuevafreak
Reputation 1,990
#2 Tom Demyan
Tom Demyan
Reputation 1,770
#3 thejeepdoctor
thejeepdoctor
Reputation 1,660
View All

Related Models For Sale

Used Ford Explorer
737 Great Deals out of 74,283 listings starting at $750
Used Jeep Wrangler
284 Great Deals out of 19,039 listings starting at $3,295
Used Toyota 4Runner
284 Great Deals out of 20,392 listings starting at $2,700
Used Dodge Durango
234 Great Deals out of 22,769 listings starting at $1,499
Used Chevrolet Tahoe
601 Great Deals out of 27,562 listings starting at $600
Used Ford F-150
2,410 Great Deals out of 209,424 listings starting at $895
Used Chevrolet Silverado 1500
1,948 Great Deals out of 159,904 listings starting at $1,995
Used BMW X5
393 Great Deals out of 15,720 listings starting at $1,300
Used Jeep Liberty
234 Great Deals out of 7,204 listings starting at $999
Used Honda Accord
703 Great Deals out of 81,926 listings starting at $500

Used Cars For Sale

2017 Jeep Grand Cherokee For Sale
20 Great Deals out of 40,437 listings starting at $23,990
2016 Jeep Grand Cherokee For Sale
54 Great Deals out of 4,315 listings starting at $21,975
2015 Jeep Grand Cherokee For Sale
144 Great Deals out of 4,668 listings starting at $19,799
2014 Jeep Grand Cherokee For Sale
219 Great Deals out of 7,271 listings starting at $14,495
2013 Jeep Grand Cherokee For Sale
37 Great Deals out of 1,242 listings starting at $10,999