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Old 05-04-2007, 02:02 PM
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slk230red slk230red is offline
WECO Installer
 
Join Date: Jul 2006
Location: Tampa, FL
Posts: 820
Quote:
Originally Posted by meltedpanda View Post
AC Condenser
AC/Refrigerant Temperature Sensor
AC Cutoff Switch
AC Evaporator
AC Expansion Valve
AC High/Low Switch
AC Relay


So which of these could be a culprit and once again , how do I check them?
DON'T touch those items unless your aux. fan is working properly. Put a set of A/C gauges on your A/C system, you will see the high pressure side go up and the compressor will shut off if the aux. fan doesn't operate. The aux. fan cools the A/C condensor to keep the high pressure side in proper range.

So, step number one is to verify correct operation of aux fan.

You should have a 3 prong Temp. Switch that looks something like this. If you unplug the connector that goes on the 2 prongs and short them out at the connector, the aux. fan should operate. In theory, that is what the temp. sw. does...the 2 pins make continuity when the temp. reaches 110 degrees C.
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1992 190E AC Question-106115b.jpg  
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1993 190E 2.3
2001 SLK230
1971 LS5 (454) Corvette Convertible

Last edited by slk230red; 05-04-2007 at 02:10 PM.
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