blower motor not shutting off

[DETROITBOY27]

when the car is running, the blower motor / fan for the heater/ac keeps running even when it is in the off position. I can adjust it from high to low. When I had the vehicel checked out the mechanic said I needed a new control unit. So I bought a new one and it did not fix it. Any ideas?

 

[BACKSLAP]

blower resistor itself, unplug it first, then check to see if the fan motor itself is shorted internally.

try these things, dont replace parts until u check your voltages bro

 

[dan2286]

blower resistor itself, unplug it first, then check to see if the fan motor itself is shorted internally.

try these things, dont replace parts until u check your voltages bro

There also might be a relay, depending on what year car it is, make sure that is good also.

 

[BILL DEMMER]

is it running at a very low speed? if so, that is the way it was designed to work, to keep exhaust gases from building up inside the vehicle.


bill

 

[srercrcr]

Ditto.
Oh, and find a real mechanic.