heat do not work,it blows cold air,whats the problem?

Asked by Dec 17, 2007 at 02:34 PM about the 1999 Jeep Grand Cherokee Limited 4WD

Question type: Maintenance & Repair

2 Answers

45,295

There are a lot of potential issues here. One is that you are low on coolant or your heater core is blocked. Check to make sure you have sufficient coolant. Two, there is a valve called the heater control valve which is vacuum-operated. All of the heater lines pass through here and it meters the coolant going to the heater core so that you get warm air when the operating temp in the coolant is correct. This is a $20 part and can cause a problem. Another possibility is that the blend door in the climate control system is not operating and is blocking off warm air from entering the vehicle. You'll probably need to have a mechanic look at this to get more information for you.

6 of 6 people found this helpful.
565

heater core is probably bad

1 of 1 people found this helpful.

Your Answer

Jeep Grand Cherokee Experts

  • #1
    inuevafreak
    Reputation
    2,150
  • #2
    Tom Demyan
    Reputation
    1,950
  • #3
    thejeepdoctor
    Reputation
    1,910
View All

Related Models For Sale

Used Jeep Cherokee
439 Great Deals out of 69,269 listings starting at $2,495
Used Dodge Durango
316 Great Deals out of 25,671 listings starting at $1,500
Used Ford Explorer
1,184 Great Deals out of 76,962 listings starting at $2,100
Used Toyota 4Runner
362 Great Deals out of 27,330 listings starting at $1,750
Used Jeep Wrangler
459 Great Deals out of 20,141 listings starting at $3,000
Used Chevrolet Tahoe
855 Great Deals out of 44,867 listings starting at $1,980
Used Ford F-150
3,209 Great Deals out of 239,423 listings starting at $1,300
Used Chevrolet Silverado 1500
2,714 Great Deals out of 196,520 listings starting at $699
Used BMW X5
372 Great Deals out of 17,724 listings starting at $2,995
Used GMC Yukon
628 Great Deals out of 23,454 listings starting at $1,200

Used Cars For Sale

2018 Jeep Grand Cherokee Limited 4WD For Sale
13,266 listings starting at $32,486
2017 Jeep Grand Cherokee Limited 4WD For Sale
71 Great Deals out of 4,000 listings starting at $29,800
2016 Jeep Grand Cherokee Limited 4WD For Sale
22 Great Deals out of 777 listings starting at $23,995
2015 Jeep Grand Cherokee Limited 4WD For Sale
80 Great Deals out of 2,804 listings starting at $19,995
2014 Jeep Grand Cherokee Limited 4WD For Sale
71 Great Deals out of 2,435 listings starting at $15,988

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.