Blower motor always running
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Blower motor always running
Hello everybody,
I've another trouble on my 91'Aerostar :
As soon as I turn the engine key on (but do'nt start the motor), the motor of the blower AC start. Its the blower near yhe air cleaner.
I don't think it's normal.
If someonr have an idea ?
Thanks
Phil
I've another trouble on my 91'Aerostar :
As soon as I turn the engine key on (but do'nt start the motor), the motor of the blower AC start. Its the blower near yhe air cleaner.
I don't think it's normal.
If someonr have an idea ?
Thanks
Phil
Post Fiend
Joined: Apr 2005
Posts: 5,720
Likes: 5
From: Washington state
Blower Control
The blower motor is controlled by a four-position switch located on the left side of the control assembly. The four switch positions are LOW, MEDIUM LOW, MEDIUM HIGH and HIGH. The four operating speeds are obtained with a resistor assembly connected in series with four of the switch operating positions and the ground side of the blower motor.
With the switch at LOW, current flow in the motor ground circuit is through three resistor coils to obtain the lowest operating speed.
With the switch at MEDIUM LOW (next position), current flow in the motor ground circuit is through two resistor coils to obtain a medium low motor operating speed.
With the switch at MEDIUM HIGH (position next to HI), current flow in the motor ground circuit is through one resistor coil to obtain a medium high motor operating speed.
With the switch at HIGH, current flow in the motor ground circuit bypasses the resistor to obtain the maximum blower operating speed.
The switch has no OFF position. The functional control must be at the OFF position to turn off blower.
http://www.autozone.com/az/cds/en_us...rInfoPages.htm
The blower motor is controlled by a four-position switch located on the left side of the control assembly. The four switch positions are LOW, MEDIUM LOW, MEDIUM HIGH and HIGH. The four operating speeds are obtained with a resistor assembly connected in series with four of the switch operating positions and the ground side of the blower motor.
With the switch at LOW, current flow in the motor ground circuit is through three resistor coils to obtain the lowest operating speed.
With the switch at MEDIUM LOW (next position), current flow in the motor ground circuit is through two resistor coils to obtain a medium low motor operating speed.
With the switch at MEDIUM HIGH (position next to HI), current flow in the motor ground circuit is through one resistor coil to obtain a medium high motor operating speed.
With the switch at HIGH, current flow in the motor ground circuit bypasses the resistor to obtain the maximum blower operating speed.
The switch has no OFF position. The functional control must be at the OFF position to turn off blower.
http://www.autozone.com/az/cds/en_us...rInfoPages.htm
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1973 - 1979 F-100 & Larger F-Series Trucks
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