What Causes a Compressor to Flood Back?

Floodback occurs when uncontrolled liquid refrigerant enters the compressor during system operation. In an HVAC/R system, the refrigerant exits the evaporator and enters the compressor in a vapor state.

How do you Unflood a compressor?

You could try to separate the refrigerant from the oil by heating the oil with a crankcase heater a few hours before starting the system, or by "jogging" the compressor. Jogging simply means that you start and quickly stop the compressor.

How do you prevent flooding and slugging?

How do you prevent flooding and slugging? Keep superheat at proper levels.