The PO has replaced the orginal A/C with a new 134 system. My fan controls are a little sensitve from age. My question is how many speeds should I have? Right now I have off, low, and high. I thought it had a third speed when I bought the car, but I cannot get it to work now. I could just be crazy. Can anyone tell me how many speeds I should have? How many did it have orginally? Anyone know a good place to send the controls to have them reworked and fixed if that is the problem?

 

I'll look on my controls for you in the morning whenI get to the shop if no one has posted it fot you by then
Jeff

 

Off-low-med-high.

If you're missing one, it could be either the selector or the little resistor.

 

Damn I was afraid of that. Guess I will try to take it apart and look to see what is going on.

 

Hey John the Cowboy,
The switch in question, also used in the heater circuit,is a special one for A/C. It is used on full size 69 and 70 Fords, Fairlanes and Falcons and 69 to 71 Mustangs. It may be still available from Ford. Try C9AZ-19986-A, Motorcraft YH-70 or look for a donor car. The standard heater one will not work.
Jim

 

you sure its a factory unit not a aftermarket it one

 

yup,my factory air is off,low,med,high.
Jeff

 

More then likely the contact point in the switch lever is dirty. Try cleaning the switch assembly.

 

I looked at it last night (did not take it completely apart). It looks like I only have three positions eventhough the selector lever will go higher than position three. The three positions are off, low, and high starting from the bottom. Guess I will have have to take it all apart to see what is going on. I know the compressor, evaporator, and condensor were replaced when the new unit was installed. I have no idea what was done to the control unit. It looks orginal, but when I get it out I will see if they have modified it.

Thanks Jim for the part number. I will check with the ford dealer and parts house today for availability.

 

Radio Shack used to carry contact cleaner. Or try Google, e-bay or Amazon. It's probably classified as hazardous so be prepared to get the run around.
Jim