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Premium Member
2,335 Posts
The ac system is more complex than the old days, evaporator temp sensor? Variable stroke compressor with different power valves? Fan and blower control can be electronic [pulse width modulated]. A scanner capable of looking at multiple signals is needed or you can take your best shot.

Start with the basics, check that wiring in the photos.
Could simply be low on refrigerant.
Has someone put the wrong refrigerant in the system?
Wrong pressure switch?

Sometimes a professional diagnosis is the cheapest way to go.
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