2005 Mazda MPV ESFACTORY OEM SERVICE PROCEDURE

No.24 A/C Always On/A/C Compressor Runs Continuously: Notes

A/C ALWAYS ON/A/C COMPRESSOR RUNS CONTINUOUSLY - DESCRIPTION AND POSSIBLE CAUSE

24 A/C always ON or A/C compressor runs continuously
DESCRIPTION 
  • A/C compressor magnetic clutch does not disengage.
POSSIBLE CAUSE 
  • Stuck engagement
  • A/C relay is stuck closed.
  • Short to GND between A/C switch and PCM
  • Short to GND circuit between A/C relay and PCM
  • A/C relay to magnetic clutch circuit shorts to battery power.
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