Question about 1999 Jeep Grand Cherokee

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I have a 99 jeep cherokee no hot air?

The blower is good but no air comes out?

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Does the air come out from the defroster? If you hear the blower motor and don't get any air from the panel, the car may have a vacuum line either off or broken under the hood. Check under the hood by the pass. side firewall and see if the vacuum line going through the firewall is off. Listen for a hissing sound around the area when the engine is running. There is a vacuum canister in the front bumper on the right side, it could be cracked.

Posted on Jan 21, 2009

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2 Answers

How do I fix my heater in my 99 jeep grand Cherokee


There are two systems to evaluate.
  1. Air Blows Fine but not Hot -> Check Thermostat and coolant level.
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Nov 14, 2014 | 1999 Jeep Grand Cherokee

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2003 jeep grand cherokee heater problem


Jeep Grand Cherokee is notorious for broken blend-air doors. This is the door inside the A/C-heater housing that switches the air from hot to cold. You must remove the dash to repair it.

Nov 13, 2011 | 2003 Jeep Grand Cherokee

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99 jeep cherokee no heat but blower working


now there are several thing you need to check( since you know the blower and vents are working) start the jeep. let it warm up, sorry to do this to you, but turn on the heater. under the hood are two hoses going to the heater core, by the blower. after the jeep has warmed up, and heater running for about 2 minutes, check to see if either hose got warm or hot. If yes, bad heater core. if no, then the control valve that allows hot coolant to the heater core is bad. you can trace it if you follow the line to the engine, it is connected to a valve, and valve needs to be replaced( you can get it at the auto parts store). hope this helps you

Jan 15, 2011 | 1999 Jeep Grand Cherokee

1 Answer

No hot air control


Probably broken blend doors if everything else is working, but its just blowing cold air. Do a google search for "Jeep Blend Doors" or "Heater treater" for more info.

Jan 07, 2010 | 1996 Jeep Grand Cherokee

3 Answers

We can't get hot or cold air to blow in our Jeep


Your blower has most likely gone out. The easiest way I can tell you to fix it is to get a haynes manual. Its not too bad of a job to do yourself, but make sure you have time and patience. Good luck!

Dec 31, 2009 | 1998 Jeep Cherokee

1 Answer

2002 jeep grand laredo blower sw not working


Have you checked the ground side of the switch?

Oct 14, 2009 | 2002 Jeep Grand Cherokee

1 Answer

I just bought a 99 jeep grand cherokee. The air


see if the air duct piping is still connected to the blower housing or the fan blade might have come loose from the motor and the shaft is just spinning inside the fan blade

Aug 11, 2009 | 1999 Jeep Grand Cherokee

2 Answers

1999 Jeep Cherokee sport/air vents do not blow out cold or hot while it is on


this sounds like the recirculation door in the heater box is broken and this is a difficult and can be an expensive repair as the dash has to be removed for access. a quick check for this is if you release the glove box and let it hang you will see the heater box if you reach up to the left top you will feel a grid and the recirc flap is housed there you can operate the blower and hot and cold and see if flap moves

Jun 02, 2009 | 1999 Jeep Grand Cherokee

1 Answer

I have a 2002 Jeep Grand Cherokee Limited with the automatic climate control option. Within the last few weeks, I have noticed cold air seeping under the passenger side dashboard, near the blower...


It could be a poor seal but I've never seen it. What you could have is a fresh air door not closing properly. Fresh air door/recirculation same thing.

Feb 24, 2009 | 2002 Jeep Grand Cherokee

1 Answer

96 Jeep Grand Cherokee will not blow out hot air


It's possible you are not getting enough coolant flow to your heater core. Try pulling the hoses off the core, blowing it out with air compressor, fill with water and blow out again. Try this about five times and see what happens. Alot of times these cores will plug up or have restricted flow. They will blow warm at low speed but it won't flow enough hot coolant through to stay hot on high blower speed.

Feb 09, 2009 | 1997 Jeep Grand Cherokee

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