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Disagreeable A/C Clutch

R

Randy Gross

Jan 1, 1970
0
I just installed a new clutch on a 96 Mercury Sable but the clutch coil
will not energize.

Aside from the fuse, what condition will prevent this.

rg
 
J

James Beck

Jan 1, 1970
0
I just installed a new clutch on a 96 Mercury Sable but the clutch coil
will not energize.

Aside from the fuse, what condition will prevent this.

rg
Low/empty refrigerant. There should be at least a low pressure cutoff.
 
D

daestrom

Jan 1, 1970
0
Randy Gross said:
I just installed a new clutch on a 96 Mercury Sable but the clutch coil
will not energize.

Aside from the fuse, what condition will prevent this.

Many A/C compressor's cycle on/off with the suction pressure. This is how
the compressor output is varied with load. If it's low on refrigerent, then
the cutout switch will keep the compressor off all the time. (and save the
compressor from burning out if there is no refrigerent nor oil left).

daestrom
 
R

Randy Gross

Jan 1, 1970
0
daestrom said:
Many A/C compressor's cycle on/off with the suction pressure. This
is how the compressor output is varied with load. If it's low on
refrigerent, then the cutout switch will keep the compressor off all
the time. (and save the compressor from burning out if there is no
refrigerent nor oil left).

daestrom
6/13/2005

This settles it for me men! Everyone I've heard from agrees. Please
forgive the massive post but, desperate situations call for desperate
measures. I've got a 1500+ mile trip tommorrow and, I dread the thought
of no A/C on the road.

Thanks again, rg
 
P

Paul Crumpler

Jan 1, 1970
0
I had the same problem in a 97 Mercury Sable. It was low refrigerant. I
added a can of R-143A and it worked fine. It has a pressure switch that
keeps it from engaging when there is not enough refrigerant.

Of course, it could be the fuse, broken wire, relay, or unplugged wire. My
bet is the refrigerant.
 
W

wmbjk

Jan 1, 1970
0
I just installed a new clutch on a 96 Mercury Sable but the clutch coil
will not energize.

Aside from the fuse, what condition will prevent this.

rg

As others have said, low refrigerant is likely. But give the wiring a
careful look over as well. A friend had a 2 year old Ford truck on
which the dealer had replaced a sensor under warranty. I don't know
what the connection looked like before the work, but the dealer had
added way too big crimp connectors on the very tiny sensor wires.
Insulation was holding things together, but a wire was broken from
flexing. I was making a long drive in the truck in 110 degree temps,
and was real happy that I could get that AC going again with a pocket
knife and some tape.

Wayne
 
R

Reason

Jan 1, 1970
0
Randy Gross said:
I just installed a new clutch on a 96 Mercury Sable but the clutch coil
will not energize.

Aside from the fuse, what condition will prevent this.

rg


In my 91 T-bird, my A/C clutch stopped working reliably for a time. I found
that all it needed was to tap the front plate, and the clutch engaged.

It appears that over time, the electromagnetic clutch was sometimes no
longer able to close the gap between the plates, perhaps due to wear.

The problem was solved by bending the flat springs in the electromagnetic
clutch with a narrow-nose plier, so that the plates were slightly closer
together. After that, it worked reliably every time.
 

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