Customer has a w/i freezer, about 30ft to ceiling. Box runnin at -18deg F, plant guys in/out all the time with forklift storing product on pallet racks. Complaint is alot of moisture/ice build-up on ceiling in front of evap. coils(2 coils). My boss checked coils and end bends on both coils, all clear of ice! We went in and ran her through a defrost, and waited to check fan delays to make sure they were working, both are good. What we did notice was alot of moisture evaperating off of coils during defrost! My boss decided to shorten defrost time and watch for next while to see any differance, I'm thinkin that 3 wire defrost terminator may be rated at too high a temp. I did'nt get up there to check the rating on the 3 wire so I'm just guessing. Any other suggestions, or is this just somthing the client will need to live with?