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Re: blow motor quit. and vent direction control.
When you replaced the blower, did you unhook any vacuum lines to the air ducts? Chances are that you did and without them, you can't direct the air to the defrost vents or any where else. Hopefully you won't have to redo a lot of the under dash work to fix this.
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if blower not working at any speed disconnect the blower motor connector and put a test lit across if lit up replace blower motor this cars are well known for melting the connector at blower motor if so replace blower motor and pigtail
had this problem which took a couple different directions. First was very simple...the control knob was turning on the shaft,, it had rounded off. Put some glue on it and worked for a year until problem like you described arose again. Replaced all components like you did but had intermittent blowing. Replaced blower again which solved problem...for now anyway...defective NEW blower.
The thermostat only controls how hot the engine gets. It could be the blower motor, or a blend door under the dash. You would need to check the blower motor for power and ground, if it is running a door may be stuck closed. The blend doors direct air thru the heater core and vents.
OK. So the blower notor isn't operating. Do you have power to the blower motor? The resistor is new from what I got. If you don't have power to the blower motor, then check the speed control switch and fuses. If you have power at the blower motor, replace the blower motor
Check the stepping motor that move the doors, it is the little white box at the bottom of the environmental station it opens and closes the door, when you remove it you can hook it up to the harness and operate the temp control see if the motor turns, if not verify power at the harness connector if there is power there then replace the motor. Hope this helps, let me know.
It sounds like your blower motor may be bad. I don't know if you know how to check power at your blower motor plug, but you can use a volt/ohm meter or a test light. If you have power (12VDC) , your motor is most likely bad. There is also a resistor block module which has 2 resistors on it. It controls the motor speed basically by restricting the power by directing it thru one of the resistors. The higher the resistance, the slower the motor turns, thus the 3 speeds for the motor. The resistor module is mounted on the blower housing and has 2 screws holding it in with a small plug connected. It is just about straight ahead of the passengers left knee.
You can get used motors from a junk yard pretty cheap.