because u need need to get a different motor
right now if it only runs on high the nyou have a one speed motor witch is gonna be on high full time
if u change your motor to a 3 speed motor then you will be able to change the speed of the motor from the thermastat
one hour a/c and heating
lead tech....
bassed out of Baton Rouge louisinana please contact if
office number 1-800-f*ck off
cell number 1-800-b*tch
is a slow running fan heater going to give same heat as a fast fan heater if both 2000 running at
heater resister is bad
You either have a bad a/c heater controller or a bad or weak a/c heater blend door..........
Switch problem? Cables disconnected?
Yes there is, but it only operates the high speed function.
The only thing I can think of...do you have the right fan belt?
It is the resistor, replace it.
The fan control module in the engine compartment has gone bad.
It means that when it only worked on high, that the resistor in the blower fan wiring went bad and the only speed the fan would run on would be a speed where NO resistor was being used, which is the high setting. Your fan went bad because it WAS only running on high for so long and now the entire assembly needs replaced. It's a PITA to get to because it's up in the dashboard so while you're in there, change out your heater core and wipe everything clean.
YOUR BLOWER RESISTER IS BAD
try replacing the blower motor resistor
Blower motor resistor defective