Question about 1999 Jeep Grand Cherokee

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The air conditioner Fan quite putting out air on the high setting

It seems to be blocked, sounds like behind the dash board - this just started, no matter what position the circulator is on it doesn't blow high any more

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A/C will only blow on highest setting

Fan speed control resistor block is the usual suspect for this. Quite in-expensive $10 - $20 ?
Easy to change, usually. Generally under the passenger side dash mounted in the air flow comming from fan. Maybe 2 - 3 screws on a block with a few wires, looking like it leads into the air cowling. May be behind glove box.
Do not run fan with new resistor out side of the air flow, it may burn out very quickly without the air blowing on it.

Sep 15, 2011 | Dodge Nitro Cars & Trucks

1 Answer

I have a 2004 chevy trailblazer and the air conditioner only works on low and high. Also only works on floor and defrost.....what is wrong?

Seems like you have two issues. The first one, I would check the fan resistor under the passenger's side dash board. Look under the dash near the fan housing you will find a electrical connector, pull that out while having the fan on. If the fan stops then you know you're in the right place. Call the dealer for another resistor.
Second issue, you may have a problem with the blend door actuator, if you're not a mechanic I would take the car to someone you trust.Let me know.

Jun 09, 2011 | 2004 Chevrolet TrailBlazer

4 Answers

My 2006 dodge ram 2500 has an ac problem the

the recirculation door is probobly broken off which is causing poor air circulation, or there could be leaves etc in the blower motor baldes.

Jun 10, 2010 | 2006 Dodge Ram

1 Answer

97 Merc Grand Marquise just started a loud

If sound comes from under the dash, it might be an hvac actuator that is having a problem? Sometimes you can put your hand on it and feel the vibration? Sometimes with a relay, you can do the same thing.

Mar 13, 2017 | 1997 Mercury Grand Marquis

1 Answer

Air is coming out of the defroster. will not come to floor or ven

It sounds like the directional flap is stuck or has separated. You'll may want to check just above your blower fan which is located behind your passenger side dash

Aug 17, 2009 | 1988 Ford Thunderbird

1 Answer


Need a new blower motor resistor. Check under hood on firewall, on passenger side under cowl, behind strut tower area is usual spot. If not may be on housing/ducting under dash on passenger side near blower motor.

Jun 01, 2009 | 2002 Chrysler Town & Country

3 Answers

05 jeep wrangler no air/heat when blower is on low

sound like you have a bad blower resister some have a module next to the fan on the passenger side by your feet there is a resister that is inserted in to the blower box or black box that is a module that is inserted that neads to be changed

Nov 21, 2008 | 2005 Jeep Wrangler

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