Another Vent control issue

Another Vent control issue

Postby Neb127 [OP] » December 30th 2014, 7:44pm

Not sure if the picture will help - but I have the issue with the blower only blowing through the defrost vents - from what I've read this is prpbably a vacuum issue ?

This T- Junction sits on the left side of the engive and the tubes dissappear down below - but the rubber coaitng seems rotten and although I haven't puled or poked to much - my question is, am I in the right area ?

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1999 Chevy LT AWD, no mods - Yet
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Re: Another Vent control issue

Postby Lumpy » December 30th 2014, 8:03pm

[broken record mode]

Don't waste time dicking around with trying to DIAGNOSE a vacuum problem. Simply REPLACE all the vacuum lines. They need it every few years anyway. Costs maybe ten bucks to do them all. THEN see if there's some other problem-prblum-prvblam.


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Re: Another Vent control issue

Postby zipwood » August 26th 2015, 1:15am

2003 Safari. I just replaced the RAD and it all seems to be working OK. I get heat and A/C but obviously I screwed up the Vaccuum Lines --- I found some line just hanging and stuck it on what I thought was it's home - but nope . all i get is defrost.

This Specific Van has always had an issue with WITH AIR FLOW, even before this latest issue. I swear it has been screwed since day one.

Anyhow , I see lumpy recos buying all the hoses (no problem) but a usefull Schematic Link may sure help

thanks in advance
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Re: Another Vent control issue

Postby Corsemoto » August 26th 2015, 1:27am

It's in the sticky at the top o' the page...

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Re: Another Vent control issue

Postby Lumpy » August 26th 2015, 2:30am

zipwood wrote:
Anyhow , I see lumpy recos buying all the hoses (no problem) but a usefull Schematic Link may sure help



If you think a schematic "may sure help" then you're not looking at the situation the same way I do.

Imagine you had a garden hose. Connects to the house on one end, to the nozzle on the other. If you bought a new hose to replace it, would you need a schematic?

View EACH vacuum hose the same way. NEVER disconnect any more than ONE END of any hose. Grab any hose. Disconnect ONE end of that hose. Plug on new, very long piece of replacement hose. Now follow the old hose to it's terminus. Pull that, snip the new hose to length, plug it in. There's one hose replaced. Repeat a dozen times and you've got all of them replaced.

No need for a schematic. The hose is in your hand. It only goes from HERE to THERE, both places you can see. That's much simpler and intuitive than looking at a drawing of an engine that may or may not look exactly like yours.


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