Cecil, I thawed a clients airline the other day for him. Isopropyl Alcohol did it. Removed airline from compressor, poured in as much as I could, re-connected airline to compressor. Ran it until pressure was 22 psi, shut it off. Had to run the pressure up once in the a.m. and once in the p.m. for 2 days until it finally broke thru.

Compressor in an unheated outbuilding. 3/8" dia airline, LONG run.

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3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).