I'm at work but wanted to ask if anyone knows if the three speed blower switch is the same for A/C and a heat only truck?

Mines acting up again and I want to replace it finally.

If you look in this link, you can see it matters.

Truck Parts and Truck Accessories

I got my question answered. I was at work and didnt have access to my parts books I have.

I really need to find a iPhone that can store all my parts and illustration guides.

D5AZ-19986-A .. Heater Blower Switch - Use with or without factory installed integral A/C (Motorcraft YH-264).

Applications: 1980/89 F100/350, Bronco & Econoline.

Additional D5AZ-19986-A applications...with factory installed integral A/C only:

1975/78 LTD without A.T.C. (Automatic Temperature Control) / 1975/80 Granada/Monarch / 1977/78 Mustang II / 1978/80 Pinto/Bobcat.

Thanks for the post. Was going to post that a last night to close this topic but forgot to.

Found out that D5AZ 19986-A also known as YH-264 is for with and without integral ac with the h vac panel.

Also found out that for those of us with the dealer air that mounted switches in the glove compartment to the right of the steering column the switch is D1RY 19986-A or YH-210