AC compressor cuts on and off

[Medic01]

My 2008 mustang has 3 female ports on high side of ac. which of these do i jump to test switch

[liya_leacree]

The reason for air conditioner without heat air.
The problem might come from Heat Pump with Capillary or one-way valve.
Four-way valve leaks.
Air filter needs clean.
Air compressor with low efficiency.
Outside low temperature and high humidity.
Auxiliary electrical heating isn’t workable.
Short of Freon.