Car not blowing hot air


Asked by Mar 02, 2016 at 08:23 AM about the 2004 Jeep Grand Cherokee Laredo

Question type: Maintenance & Repair

My 2004 Jeep cherokee  larado  is not heating up
the inside u til the temp gets up to 220 and when I
stop at a light the hot air goes warm and cold then
back to warm ....I noticed on my way home today it
was running hotter than normal between 220 to
240 then drop back under 220 for a little bit then
go back up ....What is going on.?

12 Answers


The first thing you should check is the anti freeze level. Add anti freeze if low.


Right, that's a classic low coolant symptom. Don't wait or the next symptom will leave you the side of the road with a overheated engine.


Nope I just topped the system off 3 weeks ago it's full


Still check it again and make sure the air is all gone from the cooling system.

1 out of 1 people think this is helpful.

Ok I will check it out thanks


My guess would center on the Blend door located under the dash. They fail in one position or the other... Common prob in several makes including Jeep... About 1K at the dealer... Do not attempt on your own...


Aoneal2, look at his temp readings, that is an engine that is running too warm, just on the the verge of overheating, I know the symptoms of the blend door problem, I had it on my Jeep, and this is not a blend door problem. I hope he looked it over real good.


Thanks all it was low anti freeze I bought a gallon and it almost took all of it temp is back to normal and heater kicking out again....I glad it was a easy fix just love to know what happened to the antifreeze I put in there 3 weeks ago...


You should keep a eye on the level may have a small leak some where in the cooling system. Had a vehicle with same problem had to add anti freeze every 3-4 weeks could not figure out where the leak was but added some alumi seal stop leak. Had to remove top radiator hose and add stop leak into hose because no cap on radiator could have added stop leak in over flow tank but have taken longer for stop leak to work and it did take care of my problem.


At this point in time I would be suspicious of the head gaskets if you don't see any external leaks. You might want to have the system pressure tested and if nothing is found there then go for a block check. Note heater cores are a high fail on these so look under the rig on the passenger side after you have drove it and parked for a while, it won't be much but it will have the coolant color to it and not just be the normal water from the A/C.


Don't use stop leak on a Jeep, experience talking here, I had a customer that put some in his Jeep and drove it like recommended and didn't make it back to his house before it overheated, had it towed to my shop, any way it totally blocked the spring on the thermostat so it could not open, he finally decided to fix the real leak and that was the heater core.


The mistake people make with stop leaks are if it does not stop the leak the first time they continue to add more hoping it will work that is when it can clog up the cooling system. So if you do decide to try it do not try more then two times any more after that you are asking for trouble but it is worth a try.

Your Answer

Add photo

Related Questions

  • 2010 grand cherokee does not blow cold air when a/c is on. 4 answers

    stopped blowing cold air a few days ago, had it recharged. still doesn't blow cold air

    2010 Jeep Grand Cherokee Laredo 4WD


    Maintenance & Repair

  • heater blowing cold air 1 answer

    I have flushed the heater core and changed the thermostat is there any other things I can check or fix to see if I can get my heater to blow hot air before I give up and take it to a mechanic?

    2004 Jeep Grand Cherokee Limited 4WD


    Maintenance & Repair

  • 2001 heat not getting hot 4 answers

    I have replace the thermostat, heater core and still heat not hot and some times blows luke warm.

    2001 Jeep Grand Cherokee Limited 4WD


    Maintenance & Repair

  • When the heat is on the passenger side vents blows cold air. Could this be a fuse 1 answer

    2009 Jeep Grand Cherokee Limited


    Maintenance & Repair

  • Hot Air Passenger Side Only 1 answer

    I have a2000 Grand Cherokee Limited with ATC's. Hot air comes out on the passenger side but ice cold from the center vents. The blower works fine and air does come from the vents but its always so col...

    2000 Jeep Grand Cherokee Limited



Grand Cherokee

Looking for a Used Grand Cherokee in your area?

CarGurus has 74,214 nationwide Grand Cherokee listings starting at $1,500.


Search Jeep Grand Cherokee Questions

Jeep Grand Cherokee Experts

#1 inuevafreak
Reputation 1,780
#2 Tom Demyan
Tom Demyan
Reputation 1,610
#3 thejeepdoctor
Reputation 1,470
View All

Related Models For Sale

Used Jeep Wrangler"
443 Great Deals out of 16,379 listings starting at $2,500
Used Ford Explorer"
1,361 Great Deals out of 72,128 listings starting at $300
Used Toyota 4Runner"
363 Great Deals out of 18,973 listings starting at $2,400
Used Chevrolet Tahoe"
1,147 Great Deals out of 36,615 listings starting at $1,995
Used Dodge Durango"
401 Great Deals out of 22,815 listings starting at $1,700
Used Ford F-150"
3,253 Great Deals out of 217,198 listings starting at $1,000
Used Chevrolet Silverado 1500"
2,470 Great Deals out of 144,754 listings starting at $1,995
Used Jeep Liberty"
381 Great Deals out of 9,320 listings starting at $998
Used BMW X5"
563 Great Deals out of 15,612 listings starting at $1,995
Used Ford Mustang"
728 Great Deals out of 41,499 listings starting at $900
Used Toyota Highlander"
655 Great Deals out of 31,090 listings starting at $1,990

Used Cars For Sale

2017 Jeep Grand Cherokee Laredo For Sale
1,484 listings starting at $25,990
2016 Jeep Grand Cherokee Laredo For Sale
3 Great Deals out of 1,478 listings starting at $23,475
2015 Jeep Grand Cherokee Laredo For Sale
10 Great Deals out of 253 listings starting at $21,381
2014 Jeep Grand Cherokee Laredo For Sale
17 Great Deals out of 245 listings starting at $16,899
2013 Jeep Grand Cherokee Laredo For Sale
10 Great Deals out of 192 listings starting at $13,500