AC stopped working and makes a noticeable high pitch noise especially on acceleration...blows warm to hot air. What should I troubleshoot first? Where is the compressor? AC was intermittant for a while...now it's hot as balls.

Thx

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1982 300cd 245K miles and still goin'...

Seized compressor? I think on an 82 the compressor is low on the left.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

It still blows air...just not cold air. Thx.

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1982 300cd 245K miles and still goin'...

Look at it with the engine running and see if the compressor is turning or the belt just slipping. The blowing of air is independent of whether the compressor works or not.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

open hood, start engine, have somebody sit in car and put on the a/c look for the noise...
if the belt spins, but the compressor does not you have a seized compressor.
to verify you are looking at the compressor, look for the metal line that goes in front of the motor and follow it to the compressor.

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!

watch out for your eyes. when my compressor seized the belt snapped and broke a blade off the fan. wouldnt want that to happen with your face in there looking around.

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1996 E300 110,000
1985 300TD 212,000
1980 300D 238,000

Mine did that as well, thanks to the clutch/pulley bearing going out. It loosened up enough to allow the belt to slip and make the thing hot enough to boil water off.

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RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

91 W124 300D Turbo replaced, Pressure W/G actuator installed. 210K

90 Dodge D250 5.9 Cummins/5 speed. 400K

You'll either be opening your checkbook or openeing your windows.

Sorry for your loss.

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1985 500SL Euro w/ AMG bits 130k
1984 300SD Turbodiesel 192k
1980 240D Stick China 188k
2001 CLK55 AMG 101k
2007 S600 Biturbo 149k Overheated Project, IT'S ALIVE!!!

Actually, it blew kind of cold air today. No screeching anymore. Looks like there is 123R, but maybe not enough? What can I do on my own to service the AC without special tools? Maybe it has a leak. The screeching was more of a high whine. I'll have my wife flip the AC switch when I get home from NYC tomorrow night...at least rule out the compressor. Anyone follow Diesel Giant's resoldering plans for climate control? Is that the wrong place to go if all switches work despite lack of chill?
thanks again.

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1982 300cd 245K miles and still goin'...

this could be as simple as a loose or greasy belt.

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!