Instead, a single motor on the compressor converts ... Compressors use a pressure switch to stop the motor when tank pressure reaches a preset limit–about 125 psi for many single-stage models.

÷ (15.3 psig + 14.7 psi). If the suction pressure of a system drops, as in the case of a loss of refrigerant, it can cause the compressor to operate outside its maximum compression ratio and possibly ...