960 air conditioning Q and info....

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Randy G. - 01 Aug 2004 00:38 GMT

The Q first- where is the high-pressure-side connection for a gauge on
this car (1993 960 estate)?. The low pressure is right near the
drier(?.. the silver canister near the fire wall). I ask because....

I went to an air conditioning shop recommended by my alignment guy
(who I trust). They couldn't find the high side port and said this car
doesn't have one. They said they added about a pound of refrigerant.
The air is now really cold and worked great yesterday on the way home
from the shop. Actually was dripping condensation from under the car
as it should for the first time in a while. The recirculation "off"
button turned off as well (lit automatically when car is hot inside
and then unlit when it cooled off). They said some other contradictory
things as well- each of which may not be a big deal but when taken all
together makes me not want to go back there again.
__ __
Randy & \ \/ /alerie's
\__/olvo
'93 960 Estate

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VRparts - 01 Aug 2004 01:50 GMT

If it is like a 940 there are 3 high pressure ports behind the grill.
They have pressure switches in them.

Al
94 940 166 Kmi
Had
94 940 257504 mi Crunch- Parted out
94 940 165 k mi Daughters
86 240 320 K mi
81 240D ate transmissions
79 245D

> The Q first- where is the high-pressure-side connection for a gauge on
> this car (1993 960 estate)?. The low pressure is right near the
[quoted text clipped - 14 lines]
> \__/olvo
> '93 960 Estate

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Randy G. - 01 Aug 2004 04:18 GMT

>If it is like a 940 there are 3 high pressure ports behind the grill.
>They have pressure switches in them.

I got those, but without removing a switch it is it possible to
install a test gauge? Is there a valve behind the switches that keeps
the R134a from escaping? Can a hihg-side pressure gauge be installed
there for the purpose of testing and/or filling?

Thanks!

__ __
Randy & \ \/ /alerie's
\__/olvo
'93 960 Estate

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Mike F - 03 Aug 2004 13:57 GMT

> >If it is like a 940 there are 3 high pressure ports behind the grill.
> >They have pressure switches in them.
[quoted text clipped - 10 lines]
> \__/olvo
> '93 960 Estate

Behind the switches is something like a large tire valve (schrader
valve). These switches control the fan speeds (low and high) and the
compressor cutoff if the pressure gets too high, so operating with one
disconnected for testing purposes won't hurt anything. (Reconnect the
switch to the wiring harness after removal)

Signature

Mike F.
Thornhill (near Toronto), Ont.

NOTE: new address!!
Replace tt with t (twice!) and remove parentheses to email me directly.
(But I check the newsgroup more often than this email address.)

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Randy G. - 03 Aug 2004 16:53 GMT

>Behind the switches is something like a large tire valve (schrader
>valve). These switches control the fan speeds (low and high) and the
>compressor cutoff if the pressure gets too high, so operating with one
>disconnected for testing purposes won't hurt anything. (Reconnect the
>switch to the wiring harness after removal)

THANKS Mike! That's exactly what I needed to know. The owner of the
shop I went to (recommended by my alignment guy) said his air
conditioning guy as experienced and said that this car didn't have
such a port. it reinforces some other things he said that supports my
opinion that he didn't know what he was doing. I think I'll buy the
big bottle of R134a and a manifold set and do it myself from now on!
It probably would have saved me money.

Thanks again!
__ __
Randy & \ \/ /alerie's
\__/olvo
'93 960 Estate

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Mike F - 05 Aug 2004 13:32 GMT

> >Behind the switches is something like a large tire valve (schrader
> >valve). These switches control the fan speeds (low and high) and the
[quoted text clipped - 15 lines]
> \__/olvo
> '93 960 Estate

Keep in mind that under those switches are R12 type service fittings.
If you want to hook R134a equipment you'll need to temporarily add an
adapter. Also, these are on the high pressure side, you'll want to use
one of the fittings on the drier to add refrigerant. And the R134a
fittings are different (size) from low to high, make sure you don't try
to fill from a can to the high side! And doing some of this may be
illegal where you live.

Signature

Mike F.
Thornhill (near Toronto), Ont.

NOTE: new address!!
Replace tt with t (twice!) and remove parentheses to email me directly.
(But I check the newsgroup more often than this email address.)

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Randy G. - 06 Aug 2004 16:26 GMT

>Keep in mind that under those switches are R12 type service fittings.
>If you want to hook R134a equipment you'll need to temporarily add an
[quoted text clipped - 3 lines]
>to fill from a can to the high side! And doing some of this may be
>illegal where you live.

It is still legal to fill your own R134a in California. Costco
actually sells the large (3 gallon?) bottle of R134a. I do have one
fitting on the drier and have used it to add a little R134a
previously.

Thanks again.
__ __
Randy & \ \/ /alerie's
\__/olvo
'93 960 Estate

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