Manual defrost activation did not seem to power heater till third time I got board to click. I replaced the Board in a Whirlpool Refrigerator top freezer model. Freezer coils were blocked and when I opened the panel the fan was working, so I defrosted freezer and replaced the board. Two days later, has a clicking sound seeming to come from inside fridge control panel and fan speeding and slowing in unison for a few minutes relayed from owner a couple times a day after and frosting again. Middle of evaporator normal frost pattern with heavy concentration of frost bottom 1/3 of coil blocking inlet in freezer and sides and on top of evaporator with a pile of frost in the middle reaching toward fan. Some frost also in drain hole.
This issue sounds like the control may be faulty with the pulsing of the evaporator fan motor and the clicking noise associated with it. Also the frost pattern would indicate not entering the defrost mode.
Answered by AppliancePartsPros.com | Friday, September 27, 2013