Home » Can Low Refrigerants Cause The AC Compressor To Not Turn On? Yes, when the refrigerant level drops below the recommended level, AC Compressor may refuse to start. But do not panic because a faulty compressor does not mean the HVAC unit is compromised.

Will AC compressor turn on without freon?

Registered. There is a low pressure switch in the A/C system. With no freon, the compressor clutch will not engage, therefore, the compressor, in your situation, should be just fine once the system is repaired and recharged.

What causes the compressor not to come on?

If the compressor isn't starting, check the wiring connecting the two units. If it's a blown fuse or tripped circuit breaker, the search has come to an end. Other potential causes may include a faulty thermostat, mismatched indoor and outdoor units, or the AC may just be old.