Megohmmeter is often used to condemn perfectly good compressors. 1 A scroll can be as low as . 5 megohms and still be good but some meeters show them bad at 20!!! 2 Some megohmmeters where labeled for open winding motors not sealed comoressors 3 contamination such as moisture and acids can show a lower Megohm reading. This can be corrected with clean up procedures such as driers. 4 Refrigerant, oils, oil quantity, and external connections can affect the reading. 5 Never Megohm any compressor in