how AC clutch cycles? AC thermostat checking?

David duandcc_forums@cox.net
Wed, 2 Jul 2003 12:38:33 -0400


The temperature sensor and "thermostat" are one in the same. There is a lit=
tle phillips-head screw on the top of it. Turning it counter clockwise lowe=
rs the temp at which it kicks out the compressor. Mine was at 45*, it took =
1=2E5 turns to get it to 38*F, but others have reported that it only too th=
em 1/4-1/2 to get it down to the 30s, so do it 1/4 turn at a time and allow=
 plenty of time for it to come down between turns...

Dave
1987 CGT Special Build 2.3
SE Virginia
>
> From: Konstantin Bogach <konstantin.bogach@morganstanley.com>
> Date: 2003/07/02 Wed AM 10:50:13 EDT
> To: quattro@audifans.com,  duandcc_forums@cox.net
> Subject: Re: how AC clutch cycles? AC thermostat checking?
>
> Sorry,  I meant "too high".  I expected to see 38F.  It gets to 50F in 2-=
3 min.
> It stays there for another 10 min I tested.
> Radiator shroud is in place but there are some cracks and gaps in it.  I =
will try
> to close them and see how it affects perfomance.
>
> I missed original post in the recent thread about temp sensor cranking to=
 affect
> clutch duty cycle.
> What sensor is it and where is it located?  I thought that only thing whi=
ch
> affects duty cycle is thermostat located next to evaporator
> (with thermocouple inserted inside evaporator).
> Today morning I again did not see cycling after 10 min of A/C working.  Y=
esterday
> morning I saw it in  3 minutes after turning on the car.
> Anything beside thermostat can affect it?
>
> Thanks.
> Konstantin.
>
>
> >
> >
> > Pressures are the key. Low side should be 30-35 PSI. But you say vent t=
emps=3D
> >  are too LOW at 50*F? I say that's too HIGH, my vent temps are at 38*F =
(but=3D
> >  it does take a LONG time to get down that low, 55*F comes quickly)and =
I'm =3D
> > considering giving the temp sensor another crank to get it down to 35*F=
.=2E.
> >
> > Dave
> > 1987 CGT Special Build 2.3
> > SE Virginia
> >
> >
>
>