matthew13sanderson

i know its something to do with vacum, but not exactly sure what for. the white line on it broke the other day and im wondering if i have to get her fixed.

87f-150

That is the vacum line for the fresh air door.

dirtcrew51m

It operates your hot\cold blend door for the hvac system.

matthew13sanderson

i took out my ac a while back. does this poorly effect the heat?

Just call me Sean

iTrader: (1)

No. It's the fresh air door. Hot/cold is cable driven.

Warlockk

Taking out the Ac has nothing to do with heat. However the defroster uses the Ac to dry the air, but it will still be hot without it.

5Rangers

Yea.. it will be hot but it wont be dry.. hot, moist air. Good luck clearing your ws when it fogs on the inside.

unit505

I haven't had ac in 2 years on my 95 and the defroster works super fast. You won't get much higher humidity than here in Louisiana. IMO, the fact that the ac compressor runs with the heat on is waste of power and shortens the life of the compressor. I have unplugged my ac for the winter on my 5.0. Gain in both power and mpg. Until the 90's, using the ac to lower humidity on the defroster pretty much unheard of and it's still not needed. Just my opinion and personal experience shows no need for the compressor to be running on defrost.

fordtrucknut

you post a lot of bad info on here you know that?

Just call me Sean

iTrader: (1)

Even my '80s vehicles use the compressor for defrost. Not sure about my '70s one as the a/c never worked.