1970 442 A/C Question

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Old Mar 18, 2026 | 07:30 PM
  #1  
oldsguy1970's Avatar
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1970 442 A/C Question

I have a 1970 olds. 442 orig. ac system with r12 .
the system is blowing air but not cold
the system is fully charged r12
i notice frost half way along the POA valve .
lower the expansion valve is not cold ??
the heat works fine .
is the POA valve clogged or the expansion valve bad ?? or what do i need to test .
compressor is running clutch is engaged
Thanks
Old Mar 19, 2026 | 04:05 AM
  #2  
dc2x4drvr's Avatar
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From: St Augustine
Hookup a gauge set, only way to diagnose your system.
Old Mar 19, 2026 | 07:36 AM
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Yeah, if pressures are low on both sides, the expansion valve is restricted or plugged. Just my first reaction.
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