On the 95 Blazer, the temp is controlled by by mixing heated air with fresh
air, using a series of flaps and doors...all vaccuum controled.
Somewhere you've got a "make and break" vaccuum leak....and good luck
finding it.
The vac motors controlling all this are up under the dash and most often
require dash removal to find and replace.....I know, cause I've paid to
have
it done on my 95 Blazer identical to yours.
There is a possibility that the vac switch (controlled by the knob on the
dash) may be bad. Remove the dash bezel and 4 screws and pull it
out...you'll have access to the vac lines that way, and the switch they
plug
into.
Good luck.
A vac problem would not change temp, only the location the air was blowing
from and/or whether or not the compressor is on (turns it on for defrost)
It COULD determine wether or not outside air is part of the mix, and how
much...so that might affect temp ...but only somewhat.
"mac davis" <macsplinters@[EMAIL PROTECTED]
> wrote in message
news:q9hgv3l53pb7ko69rr6c8hu8qsk7d767eb@[EMAIL PROTECTED]
> Asked this 2 or 3 times in the Chevy 4x4 group with no replies, so
thought
> I'd
> try it here:
>
> 95 small blazer, 4 door, v-6, auto, 4x4... most available factory
> upgrades..
>
> The heating/AC often decides the temperature settings for us... Can go
to
> cool
> to hot randomly, or cold to hot, if the AC is on...
> I'm thinking some kind of vacuum thing or something, but have no real
idea
> what
> it might be..
> Gotta get it fixed before summer or it's going to lose it's place as our
> daily
> driver..
>
> Suggestions?
> (besides getting a dodge, we already have 2)
>
>
>
> mac
>
> Please remove splinters before emailing
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