What is one cause of ice and frost on fan blades and fan guards in a walk-in freezer?
a. The fan delay control in the evaporator is stuck closed.
b. The drain line is frozen and ice backed up into the evaporator coil.
c. The defrost termination on the time clock is bad and it stays in defrost too long.
a. The fan delay control in the evaporator is stuck closed.
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