Check drain tube as mold will accumulate, or an ice plug forms on outlet. Reach a 3/8 metal tube into drain tube above evaporation tray and blow to verify is clear.
Remove panel over cold coil.
Clear ice plug on the drain outlet. Pour warm water and use your wet vac for excess water and ice. Push a flexible multi strand wire through the drain tube to the catch tray to move gunk. Clear the catch tray.
A tech had this trick-
A copper wire was placed in drain tube to move heat from condenser defrost heater area to below cabinet along the drip tube.
Copper is looped over heat strip below cold coil, above drain. It extends down within drain tube.
If self defrosting model check frozen drain in freezer
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