Blower resistor


#1

I’ve had to change the blower motor resistor in my 1999 Astro Van 3 times in the last year. The high speed of the fan motor will not work when the resistor goes bad.
What could cause the resistor to go bad so often? I purchased the replacement from my local auto parts store and they do replace it under warrany but I feel something must be causing he problem.


#2

You need to replace your fan.


#3

+1


#4

I Agree With TXdealer & Cigroller. A Worn Out Blower Motor / Fan Will Keep Blowing Resistors.

They are usually pretty expensive, new. If it’s not real hard to replace you could try a used one. I’ve had good luck with ones from Take-It-Off-Yourself auto salvage yards at a fraction of the new price. The trick is finding a vehicle with relatively low miles that was totalled and hasn’t been crushed. It’s good to practice the fan removal on a cadaver vehicle, too.

Call a dealer and see what they want for a new one, first. Then decide how to proceed.

P.S. Another thought. Does the fan sound OK when it works ? Sometimes debris (leaves, bugs) or misplaced foam gaskets, etcetera, interfere with the fan and I suppose that would also load up the resistor too much, just as the defective motor would.

CSA


#5

the windings on the resister gets corrosion on it and makes it not work, probably due to tempature, moister,salt,and dirt.


#6

" the windings on the resister gets corrosion on it and makes it not work, probably due to tempature, moister,salt,and dirt."

I would consider your theory if this was the original 1999 resistor, but not when “I’ve had to change the blower motor resistor in my 1999 Astro Van 3 times in the last year.

They can’t corrode that fast. If that was the case then the first resistor wouldn’t have lasted all those years.

CSA