This just started recently, but on my '05 TL with 145k miles, if I don't use the a/c for a few days and then start it up, I hear a metallic grinding noise when I turn on the a/c. This noise only lasts for maybe a second, and won't occur again if i turn off the a/c and turn it back on again. A/C has been blowing cold, so not sure what's going on. Has this happened to anyone else?
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