Ketis

so i finally hooked the vacuum line back up under my hood that controls the heat, and it will blow out of the defrost, or the floor or both.. depending on which setting i have the switch on.. so i hooked the vacuum up directly to the vent line (yellow) and it would not open the one for the vents, so im curious what in the line could have gone bad causing it to not come out of the vents.

thanks,
Keith

mjr46

if there are no vaccum lines broken anywhere it could have a defective vaccum dashpot motor for vent function

Ketis

yeah, i was thinking that, but where would you mange to find one of these?

mjr46

HMMMMMMMMMM???....GOOD QUESTION.......possibley still from ford direct...first you'd have to confirm that's what it is by tapping into the line that goes to the correct motor and with a vaccum pump pull it open and closed, the gauge on your vaccum pump should be able to register it holding the door open or closed without a drop in vaccum applied on the gauge

Ketis

well i hooked up the correct vacuum line for that vent directly to the black one, which is the one that feeds the rest while the car was running, so that should have been more than enough to open it

mjr46

yes but hooking a vaccum pump to it will verify 100 percent if it has a ruptured diaphram

Ketis

allright, so i hooked up the pump and it didnt read so there must be something wrong somewhere

mjr46

trace the line to the motor and make sure it is not broken

Ketis

ok so the end of the line was connected to nothing it turns out.... so where does it plug in? haha i really didnt see anywhere it could go

bernout

Sorry for the lack of terminology here but behind my passenger fender there are (2) 6" little canister things that have lines to both of them.. I had the lines switched on them on accident and I had your same problem.. unable to switch where the airflow comes out.. switched the lines on the canisters and worked like a charm for 5 years now.