Question about 1999 Jeep Grand Cherokee

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99 jeep grand cherokee, Defrost heater does not work, fan control in car does nothing and Ac also nothing

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Check the fuse.

Posted on May 05, 2010

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Fa goes off when ac on thn comes back onwhat may be wrong 1999 jeep grand Cherokee


Check for melted wires or connector at the blower resistor. It's located near the blower motor which is under the dash above where the passenger's feet go.

Mar 04, 2015 | 1999 Jeep Grand Cherokee

1 Answer

AC/Heater blower fan stops blowing air into the cabin when I accelerate.


Usually a vac leak. I would check for a leak in the HVAC control system and the line thru the firewall to the engine.

Aug 17, 2012 | 1998 Jeep Grand Cherokee

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My 2002 Jeep Grand Cherokee Laredo with manual climate control AC light goes off and AC stops working whenever it wants. I can force the AC to work by holding the AC button in real tight.The AC l


Have a good mechanic to check to see if the door of the a/c and heater and defroster is working properly. I had the same problem and one mechanic said he could fix it for $750. I got it fixed by an honest mechanic for less than $100. Good Luck!!

Jul 18, 2012 | Jeep Grand Cherokee Cars & Trucks

1 Answer

A/c heater blower will not work jeep grand cherokee limited 2004( checked fuses, not blown. )


check all the relays under the hood, then check the speed switch for the ac fan control.and wires

Jan 30, 2010 | 1990 Jeep Cherokee Limited

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

1 Answer

Heater/AC fan wont turn off


replace the blower speed control resistor, they short and allow this to happen

May 13, 2009 | 1997 Jeep Grand Cherokee

1 Answer

1998 Jeep grand cherokee inline 6


Check the blower motor under the dash.(on right side put a 12v lead directly to the connection and if it works, the problem may be in the switch relay or resistor pack. (i've also heard of debris holding the fan from moving so if there is power there and motor does not run, remove & check first before buying a new unit.)

Apr 06, 2009 | 1999 Jeep Grand Cherokee

3 Answers

Heat/AC Blower fan speed only works on High


Alot of people have the same problem with the fan switch and blown bulbs. There really is no fix for this. Jeep really screwed up when designing the heater control assembly. The cheapest solution is to buy another unit off Ebay. Can always go to the dealer but be ready to PAY for there mistakes.

Jan 14, 2009 | 2005 Jeep Grand Cherokee

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