2009 Blower Motor stuck on high

#1
What would cause the blower motor to be stuck on high? It does not matter if I turn the fan speed knob to 0,1,2,3, or 4, it will not change speeds or shut off. I replaced the blower motor resistor, but that did not resolve the issue. AC/Heat still seems to work fine, just the fan can never be changed.
 
#2
I finally resolved this issue. It was the fan switch. After replacing the fan switch (got climate control unit from EBay for $50). When I pulled the fan switch out to test it with multimeter noticed that continuity for the pins on the back were all the same no matter where the dial was turned. That is what led me to order another switch. Verified with new switch that continuity should change pins as the dial is changed from 0,1,2,3, and 4. Hope this helps someone in the future.
 
Top