Question about 2002 Lincoln LS

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Air conditioner fan motor speed surges

When on low fan surges from low to high. Will not maintain a steady speed.

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Needs a new blower motor controller

Posted on Feb 19, 2009

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Heater/air conditioner motor


It's probably the fan resistor for low speeds that fried.
Here's a video on how to replace it on a Volvo V70.

Jul 31, 2016 | 2000 Volvo V70

1 Answer

3 speed fan barely changes speed


You are talking about your blower fan for the air conditioner and heater right? More information will be needed to solve the problem.

When you say it barely changes speeds, does that mean it doesnt speed up, or doesnt slow down? By that I mean, is it "stuck" on low, or high?

Most blower fans run at different speeds through the use of a multi-stage resistor built into the fan switch circuit. Low speed is a high value resistor, medium speed is a low value one, and high speed is the fan running without any resistance.

If your fan is running on high and doesnt seem to want to run on lower speeds, the resistor pack may be failing. If the fan is running on low speed only, it may be that the fan itself is beginning to fail, or that the lubricant in it has gotten gummy.

Dec 07, 2015 | Cars & Trucks

1 Answer

Heater / air conditioner fan control doesn't engage fan. Previously, it only worked in high speed.


I would replace the blower motor resistor first then see if that corrects this. The resistor is located next to the blower motor under the dash.

Jul 16, 2012 | Cars & Trucks

1 Answer

The fan to the cabin heater and air conditioner in my 1987 cutless suplreme does not turn on, fuse is ok


no high speed ? fan motor relay, no slower speeds resister pack.or faulty fan switch.
Check motor with jumper lead from battery,but unplug power lead to motor first. check grounding wire to motor. if motor dont run replace!

Sep 10, 2010 | Oldsmobile Cutlass Supreme Cars & Trucks

1 Answer

Air conditioner wont turn on


It might be the fuse for the AC compressor. Check to make sure the blower motor/fan is working by putting it on heat, or vent and adjusting the level from low to high (not temperature). Fan speed. Hope this gets you started.

Apr 03, 2010 | 2006 Hyundai Sonata

1 Answer

Heater fan only works on "high speed"


All cars are designed with a blower fan motor that pushes air through the ventilation system. This air is processed by a series of vents to direct the air to various positions. Example: heater, air conditioner and defrost modes. Most blower motors are power by a basic electrical circuit that utilizes a multi resistor or a solid-state resistor to control different fan speed modes (low, medium low, medium and high). If the resistor malfunctions it may lose one or more of the lower fan speed settings.
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Mar 02, 2010 | 1999 Buick Century

1 Answer

I have a 2002 Ford Mustang. My air conditioner is not working properly. It blows into the defrost when I take off and when I let off and go a steady speed it blows out cold. It blows hot air sitting at...


if it never comes out face vents then u have a door actuator motor not working ,,if it jumps around letting off throttle then it is a vacuum problem vacuum under hood going into the firewall needs to be checked,,and vacuum resovoir might have hole in it if it is vacuum cantrol,,,the reason for warm and cald temp changes is probley not enough air flow threw radiator and condenser this will rise the high side and low side heating up the freon and it cant cool the freon down enogh to get col air ,electic fan not coming on would cause this or fan clutch (if it has one ) would also cause this .look for fan relay not working ,also did u change accumilator and dryer? ,also may have blockage in condenser i hope i shed some light on the problem

Jun 30, 2009 | 2002 Ford Expedition

1 Answer

Air condition fan only works on high speed, no low speed


You have a bad blower motor resistor. This is located under the dash close to the blower motor itself

Apr 14, 2009 | Chevrolet Colorado Cars & Trucks

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