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Posted on Jan 02, 2017
Your problem is probably a part called the heater resistor block or board. When this part burns out you will only have high speed on the fan. On my 1999 voyager it is located on the firewall and it snaps in a hole in the firewall. This is under the hood behind the alternator.
Mine had a multi pin black plug plugged into it. Unplug the plug and
you should be able to pull the block out insert new block and plug plug back in and it should come to life.
Posted on Nov 27, 2008
replace the blower motor speed control module, that is the only cause of this problem that I know of, and u are about the 20 post for this issue that I have read, it has fixed the other ones..
Posted on Feb 26, 2009
The module is located in the ducting for the heater and is accessed from the passenger area of the front seat. I think it is just under the dash but you may have to remove the glove box. it is a rectangular item held in with four screws. and should have two connectors going to it. You have to be sure to get the right replacement if you r replacing it.
Posted on Feb 26, 2009
I'm assuming the problem is the blower motor isn't coming on or working. 1st, check the fuse. 2nd, remove the glove box or pull the 2 tabs that act like stops when it's open ( the glove box will open out further) and you'll see the power plug connector for the blower unit. Turn on the blower through the climate control (heat, A/C, or whatever) and wiggle the connector to see if the blower turns on. If starts working, then an easy solution is pull the connector off and gently press the prongs together or inward. Then carefully reconnect with damaging the prongs. This worked for 96 Mark VIII due to the fact the prongs were not "seating" correctly in the female connector. It's been about 2 years since I did this and the connection is still good. If wiggling the plug doesn't work, pull the plug, turn on the climate control (heat, A/C), and check for voltage to the plug. That's about all I can help with.
Posted on May 28, 2009
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