Need help identifing this part

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Jun 26, 2013 | 08:57 PM

erica

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From: Seattle

Need help identifing this part

89 F250, 7.5....Looking at the engine it sits back by the firewall on the passenger side. It is to the left of the heater hoses. It's about 2" round and high. There is a flat metal piece attached and if you push on it it sounds like there is fluid in the container. One white wire comes out of it and I can't tell where it goes. It is wrapped up with a bunch of other wires. Those wire seem to go somewhwere in the dash area. The reason I am asking is that the white wire literally crumbled in my hand. If this item is important we will replace it. If it isn't important it can wait. The truck has been sitting since 2009 and we are working on getting it started again.
Thanks

Jun 26, 2013 | 10:54 PM

rla2005

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From: Kentucky

Does it look like this?

courtesy of subford

Jun 26, 2013 | 11:54 PM

erica

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From: Seattle

That's it!!! It's a vacuum hose for what?
Thanks

Jun 26, 2013 | 11:58 PM

Yaga1973

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From: Moore, OK

That activates the door that selects outside or inside air. It typically only works when your A/C is on Max.

Jun 27, 2013 | 05:35 AM

joegeds

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From: Livonia, MI

Quote:

Originally Posted by Yaga1973

That activates the door that selects outside or inside air. It typically only works when your A/C is on Max.

Mine crumbled as well. Where does the other end attach to? Could this be why my A/C isn't as cold as I'd like? BTW, I have a '96 F150 300 straight 6, if it matters.

Jun 27, 2013 | 07:15 AM

rla2005

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From: Kentucky

A link to a thread in another forum: A/C and/or heater stuck on defrost - FSB Forums

Starting around Post#19 there are some great photos.

Jun 27, 2013 | 08:58 AM

Yaga1973

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From: Moore, OK

To repair the line, you will have to unwrap the harness that it comes out from. That's what I had to do on my '96 to find enough good tubing to actually connect to. I simply used a combination of rubber and plastic vacuum line to restore it.