It seems that the last three years I've had to replace the A/C-heater fan speed regulator/resistor once a year. Lucky I bought the $100 resistor from Auto Zone with a life time replacement warranty but that doesn't mean anything when it fails and the fan goes to wide open/full fan speed and you have to order a new one and replace it

I don't know how to track down what is causing them to fail but I'm thinking one thing might be a bad voltage regulator or something that one of you guys might know what I should be looking for?

This is the exact regulator/resistor that I can now replace in less than five minutes but what a PIA to have to order, go get, and return the bad one every year, what besides made in Mexico/China is making them fail now? Any suggestions would be greatly appreciated

Glad to see I'm not the only one with this problem. Replaced the resistor in a '98 Concorde, it lasted one week. Let it go for a while and decided to replace it again. Lasted one week again. I suspect the blower motor is going bad causing the resistor to overheat.

i would check the motor ground or switch

probally the motor pulling too many amps.Caddy years ago had the same problem.You had to test the motor to make sure the amps werent high or it ate the resistor.They were one of the first to have a transistoried one.Rocky

Aftermarket ones are garbage, Pony up and spend the money for a OE one.
Most times the root cause of them failing is the Motor drawing too much current on start up.


Rick