91 300 TE 4MATIC a/c problem - Mercedes-Benz Forum

 
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post #1 of 2 (permalink) Old 06-26-2011, 09:11 AM Thread Starter
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Vehicle: 91 300 TE 4MATIC
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91 300 TE 4MATIC a/c problem

Just replaced the compressor, expansion valve and dryer. I did flush and evacuate the system. Could only charge the system by directly powering the compressor. System remains full but not fucntional unless hotwired. Going crazy trying to figure out what is cutting power to the compressor. The aux fans do work tested both of them. I jumped the wires on high pressure switch and fans work. Have voltage to one wire on the low pressure switch. Any suggestions?
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post #2 of 2 (permalink) Old 06-27-2011, 07:36 AM
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Replace the pressure sensor seems in order here.

ERIC.

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