What is this?? line near heater core connections

[zluikens]

First time poster but have been a reader for a while now. I have been very impressed by the level of knowledge on this forum! Sooo I've got my first question.... Does anyone know what this broken line is for? It looks like some sort of sensing/vacuum line, possibly for the heater since it is in that general area. I have the same broken line in my '94 bronco. I am planning on fixing it with some rubber hose, just wanted to know what it was for and if it being broken causes any issues....

[Fordman247365]

I believe its the vacuum line for switching the vent off when you have the AC on so no hot air can get in there

[CELAYORK]

Originally Posted by Fordman247365

I believe its the vacuum line for switching the vent off when you have the AC on so no hot air can get in there

Agree with that.

[CELAYORK]

Originally Posted by zluikens

First time poster but have been a reader for a while now. I have been very impressed by the level of knowledge on this forum! Sooo I've got my first question.... Does anyone know what this broken line is for? It looks like some sort of sensing/vacuum line, possibly for the heater since it is in that general area. I have the same broken line in my '94 bronco. I am planning on fixing it with some rubber hose, just wanted to know what it was for and if it being broken causes any issues....

The white tube its very fragile, you can get one in the junk yard, but maybe its also very fragile (old) or yes you can use rubber hose as I did, IIRC its a 1/8 vaccum hose. Other uses the hose for the boost gauge.

[351fifty]

yeah mine looks all coroded and pretty crappy too, not quite broken off, btw

[zluikens]

Thanks for the info and quick replies. I plan on cutting the old line back until it is more solid and repairing with the 1/8" vacuum hose you recommended.