Somewhere else on this site there is a discussion about a "grinding noise" at startup. Seems one of the club members found out from Ford that there is a TSB regarding liquid refrigerant which finds its way into the compressor. At startup, the compressor pumps the liquid out and back into the system. Since the A/C compressor is not able to compress the liquid further, it momentarily has a hard time getting rid of the liquid refrigerant. I gather it is not harmful to the compressor, but is most noticeable in cars with the auto A/C which is automatically engaged at startup.
I was relieved to hear that it was a known issue since mine does it almost every time I start up in warm weather after a few hours of sitting.
I was relieved to hear that it was a known issue since mine does it almost every time I start up in warm weather after a few hours of sitting.
