124 A/C Heat Blower Motor
 

91 300TE 124,000 miles

Blower motor sounds good but will not switch speeds, stays at a medium? speed only. The fuse on the left front shock tower area is new and I tried jumpering the fuse...tried a dash pushbutton unit that was known to be good from another car...no changes.

Any suggestions would be appreciated, thanks!!!!!!

If you tried a different push-button unit, and if the speed still does not modulate, the problem is likely with the blower motor regulator. Will have to get to the motor to confirm this, thats where this regulator is.

Thank you for the help. As suggested, it was the blower motor regulator.