Select possible cause of an iced up evaporator on a commercial ...

[ghost!]

Select possible cause of an iced up evaporator on a commercial freezer. You may choose more than one.
 
  A) Bad defrost timer motor B) Bad evaporator fan motor
  C) Open defrost heaters D) Dirty condenser
  E) Shorted defrost termination switch F) Bad condenser fan motor

Question 2

Over defrosting is caused by:
 
  A) A defrost initiation failure B) A condenser fan failure
  C) A compressor failure D) A defrost termination failure

[coyin]

Answer to Question 1

A, B, C, E

Answer to Question 2

D

[ghost!]

Thanks for the timely response, appreciate it

[Zebsrer]

Great answer, keep it coming