how AC clutch cycles?
konstantin.bogach at morganstanley.com
Wed Jul 2 18:36:49 EDT 2003
Thanks. I thought about it when disassembled thermostat. That screw presses against bi-metalic contact.
But in my case it does not work cause the problem is the clutch is not cycling. More precisely, it cycles sometimes and somethimes not.
When it cycled Inoticed that themperature at vents is still 50F.
> The temperature sensor and "thermostat" are one in the same. There is a little phillips-head screw on the top of it. Turning it counter clockwise lowers the temp at which it kicks out the compressor. Mine was at 45*, it took 1.5 turns to get it to 38*F, but others have reported that it only too them 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...
> 1987 CGT Special Build 2.3
> SE Virginia
> > From: Konstantin Bogach <konstantin.bogach at morganstanley.com>
> > Date: 2003/07/02 Wed AM 10:50:13 EDT
> > To: quattro at audifans.com, duandcc_forums at 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 which
> > 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. Yesterday
> > 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 temps=
> > > are too LOW at 50*F? I say that's too HIGH, my vent temps are at 38*F (but=
> > > it does take a LONG time to get down that low, 55*F comes quickly)and I'm =
> > > considering giving the temp sensor another crank to get it down to 35*F...
> > >
> > > Dave
> > > 1987 CGT Special Build 2.3
> > > SE Virginia
> > >
> > >
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