HVAC switch or motor

U

UNVMATT

New Member

Jan 15, 2004

294

0

0

COLUMBUS

Sep 27, 2004

#1

• Sep 27, 2004

• #1

Can anyone help me. My Fan for my HVAC only works on high..any of the other 3 settings the fan doesnt work. My guess is that the control switch is bad..Anyone know how hard it is to change..Or if they think something else may be wrong. Im not sure how the system is designed so I guess it could be the motor but im not sure.

 

5.0's 4 ever

The #1 Stunna

Founding Member

Jan 22, 2000

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76

Orlando, FL

Sep 27, 2004

#2

• Sep 27, 2004

• #2

You need a new blower motor resistor

 

N

n0v8or

10 Year Member

Aug 23, 2003

604

8

39

Rhode Island

Sep 28, 2004

#3

• Sep 28, 2004

• #3

You can get to the resistor assembly by removing the glove compartment, or just swinging the door all the way down (squeeze the sides together to open it past the stops). The resistors are mounted on the duct just above the blower motor. Pull off the connector and use an ohmmeter to check from each pin to all of the others. The assembly is just 3 wirewound resistors in series, plus a thermal breaker; you should read a low resistance between all pins if it is OK.

 

U

UNVMATT

New Member

Jan 15, 2004

294

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0

COLUMBUS

Sep 30, 2004

#4

• Sep 30, 2004

• #4

Thanks!
I have a degree in electronics so I understand what you are saying..

I just dont have a schematic of the system. I'll check it out tonight!

 

N

n0v8or

10 Year Member

Aug 23, 2003

604

8

39

Rhode Island

Sep 30, 2004

#5

• Sep 30, 2004

• #5

I posted the '01 schematic (yours should be the same or close) at:

http://members.cox.net/n0v8or/mustang_heater.pdf

With this, finding the problem should be child's play for you.