I've had my A/C serviced twice in the last year due to warm air blowing at lowest setting. Refrigerant was replaced in both cases. Last service cold air only lasted 3 days. Presume compressor leak. Any other potential causes to explore before a full compressor replacement?

 

Check for leakage with a UV Dye, refrigerant with leak detector. A leakage could be in the evaporator, on of the lines or the inlet valve (like mine).

 

Thanks for the UV testing advice...will do!