Type 44 A/C Troubleshooting Assistance

[John Sherrow]

I had a similar problem this spring. The MFTS outputs an overheat signal
which disables the compressor. I didn't think it would be the MFTS because
the temperature gauge worked fine. I put electrical tape over the one pin on
the MFTS and the AC works fine.

----- Original Message ----- 
From: "Gary Meier" <b1biker at neb.rr.com>
To: "Audifans" <quattro at audifans.com>
Sent: Monday, June 27, 2005 10:03 PM
Subject: Type 44 A/C Troubleshooting Assistance


Fellow Listers -- 
Patient is a 1988 5KSQ - converted to R-134 about 5 years ago
Symptoms:
A/C compressor will not engage - jumpered relay compressor runs - suction
pressure is good - A/C cools well -- I suspected the relay - tried 2
different relays from the salvage yard, compressor will not start - seems
unlikely, although not impossible that 3 relays would have failed in the
same manner.
Prior to the start of this problem there were times when the A/C - Climate
Control would seem to get lost and stay in heating when cabin temps were
above setpoint and vice versa. Is it possible that my problems are caused by
the cabin temp sensor, the circulating fan for this sensor is functioning
properly? What other possible sources for this/these problems should I be
investigating? Any help will be greatly appreciated.
Thanks in Advance
Gary Meier
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