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1999 jeep wrangler heater blower

The heater blower in my jeep wrangler only works when the knob is on high. The switch moves easily from one setting to another, but only runs on high. Please advise me how to fix this? Thanks so much for your time.

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You need to change the resister block for the fan. it is located on the heater duct near the fan... there is a connector on it and two or three screws holding it in.

Robert

Please take a moment to rate this solution thanks

Posted on Feb 21, 2009

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1988 jeep wrangler heater blower motor doesn't work


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I have a 1999 Jeep Wrangler and the heater fan stopped working for all the fan speeds. The fuses are fine. How do you know if it is the blower resistor or the blower motor?


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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.)

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If the blower isn't working there are a few options.

Look in your fuse box under the dash on the drivers side and check the fuse that should be marked blower motor.

Next, The blower motor relay will be in a long rectangular box, near the battery. It will have a cover with a couple little clips that you have to squeeze to get it off. The lid of the box on the inside will have a diagram that tells you which relay is for the blower motor. If there is another relay with the same number on the back, you can swap it and see if the blower works. That's the easier way to see if that's the problem.

If it's none of those, then it's probably the blower motor itself. I would check to see if it's getting power before you replace it though. It could be the fan control switch on you dash too, but they don't go bad as often.

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1 Answer

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Check the blower motor resistor, I,m not sure where it is located on your vehicle most are on the firewall under the hood.

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