Question about 2000 Jeep Grand Cherokee

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We have changed the heater core,,, and thermostat.. it is still blowing cool air... i bought the coolant temperature sensor but dont know where it goes is it behind the dash board also?

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Hi I have a 2002 JGC ltd and it is most likely your dampeners or louvers located behind your dual temp controls for driver and passenger sides that control the direction of air flow from air outside in, circulation, heat to windshield, centre and or to floor etc. I had a friend that had heat only to the passenger side and cold air blowing to driver side. He took it in and they replaced stuck dampeners and it was not cheap. I also had a 98 JGC ltd with the (coolant sensor is bad) warning coming on at least 4 to 5 times in a day and had heat. My problem is that my interior glass was fogging up, used glass defogger and stop leak. The problem was fixed but I still smell antifreeze because of the leak and it is irritating me. I may consider replacing the heater core and was wondering if you took it in or did it your self and how did you do it if you replaced it yourself, plus how much did it cost you?


Thanks.

Posted on Nov 10, 2012

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Posted on Jan 02, 2017

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SOURCE: 2002 jeep grand cherokee heater doesn't blow hot

If ythe heater core is not bad then I would replace the thermostat, this will stop the warm coolant running up to your engine go to the heater core.

Posted on Feb 01, 2009

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SOURCE: heater core 2002 jeep grand cher.

I purchased a Blen Door repair kit. for my 2002 Jeep Grand Cherokee after having only cold air blow out of the passenger side for over a year. I found it on EBay. It requires you remove the glove box, cut open the heater box and replace the blend door. I really didn't want to cut that open, however, with the tape that comes with it, I have had no problems with it leaking any air. The dual control no longer works, the temperature is now completely controlled by the drivers side, but to save $1200, I was willing to do this. I have taken the entire thing out before to replace the heater core, didn't want to do it again.

Posted on Feb 15, 2009

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SOURCE: Grand Jeep Cherokee Heater Doesn't Work

water pump could be bad and leaking from the weap hole. you have no heat cause theres a hole in the coolant system

Posted on Jun 09, 2009

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SOURCE: how to change out heater core on 2002 Jeep Grand

this is a very complex procedure and one not really to be done outside of a dealership as the dash and interior require removal to gain access to heater core

Posted on Jul 03, 2009

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SOURCE: Vehicle needs to purge all the air form the radiator. Jeep Grand

Run engine normally while filling radiator. Leave heater on high heat. When engine temp reads normal, shut it off, wait about three minutes...re-start and complete filling.

Posted on Aug 11, 2009

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Sounds like the air blend door is not opening to let heat in.

Engine coolant is provided to the heater system by two 16 mm (5/8 inch inside diameter) heater hoses. With the engine idling at normal running temperature, set the heater-A/C controls as follows. Temperature control to full Heat, Mode control to Floor, Blower control to the highest speed setting. Using a test thermometer, check the air temperature coming from the center floor outlets and compare this reading to the Temperature Reference table.

If the floor outlet air temperature is insufficient, check that the cooling system is operating to specifications. Both heater hoses should be HOT to the touch (the coolant return hose should be slightly cooler than the supply hose). If the coolant return hose is much cooler than the supply hose, locate and repair the engine coolant flow obstruction in heater system.

POSSIBLE LOCATIONS OR CAUSE OF OBSTRUCTED COOLANT FLOW
If coolant flow is verified and the heater floor outlet temperature is insufficient, a mechanical problem may exist.

POSSIBLE LOCATION OR CAUSE OF INSUFFICIENT HEAT
  • Obstructed cowl air intake.
  • Obstructed heater system outlets.
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If heater floor outlet temperature cannot be adjusted with the heater-A/C control temperature control lever, one of the following could require service:

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Ambient Air Temperature 15.5° C (60° F) 21.1° C (70° F) 26.6° C (80° F) 32.2° C (90° F)
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If the floor outlet air temperature is too low, Both of the heater hoses should be hot to the touch. The coolant return heater hose should be slightly cooler than the coolant supply heater hose. If the return hose is much cooler than the supply hose, locate and repair the engine coolant flow obstruction in the cooling system.
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Possible locations or causes of obstructed coolant flow: Pinched or kinked heater hoses. Improper heater hose routing. Plugged heater hoses or supply and return ports at the cooling system connections. A plugged heater core. If proper coolant flow through the cooling system is verified, and heater outlet air temperature is still low, a mechanical problem may exist.
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1 Answer

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Feb 07, 2010 | 2000 Buick LeSabre

2 Answers

I have a 1998 Dodge Dakota 5.2/ V8 4X4 and was told the Firestone service Rep that my water pump and thermastat were defective. I could smell coolant both outside and inside the truck. Also when the heater...


If the heater core isn't leaking it doesn't likely need changing. It sounds like you could have a problem with the heater control valve - a valve in one of the heater hoses that controls flow through the hose. If you smell coolant and see moisture on your windshield (inside) or have coolant leaking onto the floor - you might need the heater core replaced.

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1 Answer

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1 Answer

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sorry about the spelling
jon

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