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Old 09-03-2003, 11:28 PM
Posts: n/a
ac autoshuts off after some time (s500) 1995

My A/C automatically shuts off ever 40 seconds or after a while. It is getting very frustrating..i have to keep restarting it..sometimes it freezes on so i cant use the a/c control to close it, change it etc.

To stop this freeze that occurs, i have to open the hood and pull out fuse 18 and put it back...

anyone know how to fix this problem..

does it have to do with the outside temp? because in the day time it was 80-90s and humid and a/c kept restarting/freezing every now and then but at night time 70s-80s...the a/c didnt do this..

thanks in advance
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Old 09-04-2003, 07:45 AM
it leaks, its german
Join Date: Mar 2002
Location: raleigh nc
Posts: 1,111
There are several parts that could cause this, evap temp sensor, push button panel, MAS (if equipped) and so. When its in a failed state you've got to find what missing.

Project Smoker, '87 603 powered wagon
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Acme Automotive Inc.
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Old 09-04-2003, 08:05 AM
Join Date: Mar 2000
Location: Gainesville FL
Posts: 6,844
One other intermittant on the early 4vlv v8s is the wiring to the speed sensor gets stretched by settling motor mounts and a bad speed signal cuts the compressor.
Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
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Old 09-04-2003, 12:48 PM
Join Date: Jan 2003
Location: Florida
Posts: 1,084
AC diagnostics

Try this webpage I think it shows how to read codes that you can pull up yourself
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