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AC not cooling

Hi,

AC in my -71 is not cooling. I don't sense any meaningful deviation from the temperature with the AC off.

I fixed the heater valve, it does not circulate hot water when closed. Previous owners have installed sanden compressor (it does not have quick disconned fittings, but threaded ports in the backside) and new barrier hose to condenser and to expansion valve, new drier, the long hose that connects to drier is apparently old one, old expansion valve under dash untouched by the looks of old black "stuff" on it.

When I put the AC on with car running the condenser fan works and you can see fluid running from the drier sight glass. Looks like solid stream rather than bubbles.

Any educated suggestions where to begin?

Thanks,
Janne
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