blower motor not working on high speed

[ponticamatt]

we have a 1998 se and the blower motor will not work on high, purchased a blower motor controller and installed it, but still no high speed.....any help would be nice

[JJ052653]

A few people have had blower heater/ac blower problems. It appears that the Heater/ac motor is faulty. If you do a search for Blower Motor you'll see other people have had similiar problems. They have replace the motor and that solve the problem.

[randman1]

If the blower motor works on lower speeds than I wouldn't think that your problem is there. I would first suspect a problem with the blower motor relay or fuse 3 (30amp) in the underhood fuse block (I'm assuming that you do not have elecrtonic climate control). Fan speeds low, med 1 and med 2 go through a blower motor resistor and then directly to the motor. High speed though will trigger a relay and supply voltage through a seperate circuit.

Locate and check the fuse first to verify that it's good. Next, locate and test the relay. I'm using diagrams for a 93 so please check the fuse covers or your owners manual to make sure you're checking the right fuses and relays.

[JJ052653]

Look at the thread, "Heater Blower works intermitently"

[markwb]

When the blower fast speed relay picks up, it applies full potential (12 +) to the blower motor bypassing the resistor network entirely.