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

104,305

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

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Jeep Grand Cherokee Experts

#1 inuevafreak
inuevafreak
Reputation 1,900
#2 Tom Demyan
Tom Demyan
Reputation 1,700
#3 thejeepdoctor
thejeepdoctor
Reputation 1,560
View All

Related Models For Sale

Used Ford Explorer
1,107 Great Deals out of 72,088 listings starting at $1,000
Used Jeep Wrangler
526 Great Deals out of 18,474 listings starting at $2,500
Used Toyota 4Runner
379 Great Deals out of 20,969 listings starting at $2,495
Used Dodge Durango
381 Great Deals out of 23,255 listings starting at $1,500
Used Chevrolet Tahoe
869 Great Deals out of 28,110 listings starting at $1,700
Used Ford F-150
3,137 Great Deals out of 208,987 listings starting at $1,200
Used Chevrolet Silverado 1500
2,605 Great Deals out of 152,728 listings starting at $1,500
Used BMW X5
507 Great Deals out of 15,565 listings starting at $2,500
Used Jeep Liberty
299 Great Deals out of 8,176 listings starting at $1,300
Used Honda Accord
1,012 Great Deals out of 75,624 listings starting at $899

Used Cars For Sale

2017 Jeep Grand Cherokee For Sale
35,282 listings starting at $25,590
2016 Jeep Grand Cherokee For Sale
47 Great Deals out of 6,177 listings starting at $20,975
2015 Jeep Grand Cherokee For Sale
147 Great Deals out of 4,503 listings starting at $14,900
2014 Jeep Grand Cherokee For Sale
180 Great Deals out of 5,910 listings starting at $14,679
2013 Jeep Grand Cherokee For Sale
72 Great Deals out of 1,465 listings starting at $11,984