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Chrysler Repair/blower motor control module?

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Expert: - 6/30/2011


Question
Roland, like you I have been wrenching forever and I read your response to the Concorde blower motor staying on and the answer was quite helpful, but I was wondering if you could please expound on the "blower motor power control module" as there are those times when we as mechanics usually name things that are not called what they actually are. I looked up "power control module" and got pages and pages of "blower motor resisters". From your description of the location of the item in question, to the left of the blower motor for cooling purposes and from the pic on the parts pages you can see my confusion as the resistor also requires cooling. So do you mean the "blower motor resistor" or the "control module" with the thermistor attached? Thank-you for your time and response, Greg

Answer
Hi Greg,
The type of blower motor device depends upon whether it is a conventional control unit (which has 4 blower speeds) or a automatic temperature control unit (which has 14 speeds). The former is accomplished by a simple resistor block (4 resistance choices) where the latter uses a solid state variable voltage source to produce the various speeds called a power module. So that pairs up the type of the device to the control head.
Roland

Chrysler Repair

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Roland Finston

Expertise

I specialize in Chrysler/Dodge/Plymouth cars, minivans, and SUV's for the model years 1982-2008 based upon my 50-year DIY experience, factory shop manuals and wiring diagrams. I offer fast repair advice to help you minimize repair costs by helping you diagnose and do it yourself. Problems with electronically controlled engines and transmissions as well as body wiring problems are my specialty.

I take questions one at a time between 8am and 10pm CT and attempt to answer within 20 minutes. "Maxed Out" means I am answering another question of otherwise busy, so try again later.

There are answers on file to more than sixteen thousand Chrysler questions at your finger tips: put a few key words in the "find" box (above) or click on "view past answers" for a chronological list of my q and a's. Don't use "Add to this answer" if you still have a question...ask it. As to trucks and jeeps I only have manuals for the '04-'06 model years.

Experience

Five decades as a 'do-it-yourselfer' on domestic and imported cars

Organizations
Yahoo Autos Group called The Chrysler Lebaron Club (co-moderator)

Education/Credentials
Degrees in Physics/bruised knuckles.

Awards and Honors
"Top expert of 2010" and "2011" at Allexperts. Among top 50 experts for years 2006-2009 at Allexperts.

Quickest "average response time" at Allexperts (currently no. 1).

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