A/C Control (fan speed) problems

I have a '94 JGC Laredo V8 5.2L and it has a problem with the A/C fan control knob.
When turning it on, only works on speed 3, but does not in the 1 and 2.

I went to a Jeep Dealer and they replaced the Fan resistor and it worked for about 6 months. After that, I had the same problem.

Something is burning the Resistance, but I don't want to spend US$50 every 6 months replacing the part.

Any idea what may be happening?.

Thanx,

Hiroshi

I have a '94 JGC Laredo V8 5.2L and it has a problem with the A/C fan control knob.
When turning it on, only works on speed 3, but does not in the 1 and 2.

I went to a Jeep Dealer and they replaced the Fan resistor and it worked for about 6 months. After that, I had the same problem.

Something is burning the Resistance, but I don't want to spend US$50 every 6 months replacing the part.

Any idea what may be happening?.

Thanx,

Hiroshi

I would ask the dealer if there was/is a TSB on the fan resistor card as several Chrysler models had issues with this card (i.e. Stratus, Intrepid..) While Mopar should have purged any suspect stock they mays have supplied a bad part that simply failed. Even Worst yet the dealer could have had that part sitting on the shelf for some time and installed the suspect part.

Ask the dealer if there is any type of warranty on the last installed part since it was only six month's

Thanks for your suggestion.
I contacted the Dealer and told me there is no TSB related with that part (#4720278).
He told me also that the warranty covered only 3 months, and recommend changing the piece again and that "should work again for a while" :s.
Any other recommendation is welcome.

Regards,
Hiroshi

Have someone, with a dvm and the know how, check the current draw on the circuit in all speeds.

not sure what the spec is but compare it to another vehicle

High current draw could be caused by a short in the motor or rotating resistance from tight bearings or possibly something in the fan.

JD