I've researched this some and read the threads where data is limited and further troubleshooting doesn't happen.

I replaced my behind-glovebox cabin air filters and the under-dash carbon air filters about 18 months ago. I have to park this car outside, so I have had some mouse nest issues in the engine bay, so maybe there's a pile of junk on top of those cabin filters again. I'll check.

I don't have any AC gauges. Maybe I should invest?

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