Location of Fan Blower Resistor

Aug 03, 2006 4 Replies

Help. I can't find the fan blower resistor on my 99 Mercury Mountaineer with climate control. I bought the replacement part and expected to find it in the usual location(s)--in the ductwork ds of the fan under the hood. Well there is a lot if aluminized insulation on the box but no wires going in that I can see. So I took the glove compartment out thinking it might be in the passenger compartment--no joy. Anybody know the location of this part?



Thanks, Jerry



It is in the blower housing but the auto climate control does not use a resistor. It uses a motor controller which is significantly more expensive. If you're looking under the hood at the blower motor the controller is at about 5 o'clock. There's a black wireplug that goes into it.

On the 1998 Mountaineer the Blower Motor Switch Resistor, if that's what you're referring to:

The heater blower motor switch resistor has the following features:

  1. - The assembly is located on the evaporator housing in the engine compartment.

  1. - Three resistance elements are mounted on the resistor board to provide four blower motor speeds.

  2. - Depending on the heater blower motor switch position, series resistance is added or bypassed in the blower motor circuit to decrease or increase blower motor speed.

  1. - An overheating protective device (thermal limiter) will open the resistor coil circuit when the temperature reaches 121ºC (250ºF) interrupting the blower motor operation in all speeds except HI.

  2. - The thermal limiter cannot be reset and is not serviceable.

Good luck,

Steven

No Twilight wrote:

OK. Followup. It's a little difficult to get to. The screws that hold it in are sheetmetal screws and take an 8mm socket. I removed what I think is the cruise control actuator (one 10mm head screw) and used a 1/4" drive ratchet to remove the outboard one--slow and tedious. I used a replacable tipped screwdriver adapted to the 8mm socket with about 10" of extension to reach the inboard one pretty easily. You'll need a flashlight or shoplight even in good lighting.

Fan works fine now. (symptom was no controlled speeds, only high and off)

--Jer

No Twilight wrote:

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