Okay, been searching the forums and can find answers, but not the exact answer.


Background:
Had a power surge/outage about 3 weeks ago.

Problem:
Freezer and frig went out. Replaced control module/motherboard, as it was physically smoked. Unit started up and everything worked fine. The damper motor did however make a clicking sound until the frig side started to cool, and then it quit, now Freezer is cold, frig is not. Evap coil is iced over.

What I have done to date:

As stated, replaced control module/mother board.

Checked defrost thermostat when cold, it has continuity, opens up at room temperature.

Checked defrost heater, it has continuity.

Found out through a search here that the small clear coated wire loop taped to the freezer t-stat probe is probably the evap thermistor. It has 6.5 ohms at 76 degrees, room temperature. This thermistor does not show up as a part number on the parts list on section 5.

Checked both t-stats manually, and they open and close and have continuity when switching all the way from off to extreme cold setting as the dial is turned.


As I said before, evap and condensor fans are working, and the unit was cooling along just fine, then yesterday I noticed the temp in the fridge rising, snow in the freezer compartment, all the usual suspects for typical problems I have seen on here. removed back cover and the evap coil is iced over. Damper door was not working...

Any ideas what could be wrong...

Thanks,
Tom

How do I force a defrost cycle?

In addition, I have all those diagrams, but they do not show the evap thermistor part number. Does this appear correct from the reading I posted?

T,

No, it's the small clear coated wire loop taped to the freezer t-stat probe. It does not show up on the parts diagram.

Again, how do I force a defrost cycle?

T,

Perfect, thanks......

Now, what are your thoughts about the small sensor taped to the freezer t-stat capillary tube..? Could that be a thermistor? If so, do you know where I can get a part number, I don't see one anywhere?

I know, driving me nuts, it is a wire that is plugged in series with the damper motor. It has a clear plastic outer jacket, with what appears to be a tightly wound wire coil inside. It is about 6-8 inches long, and just makes a loop, in and out of the plug. It is taped with foil tape to the capillary tube that goes into the freezer from the freezer t-stat. I cannot find reference to it anywhere. It ohms at 6.5 ohms, at room temperature, which is right inline wth some of the other readings I see from the other brands......I am at a loss here as to what to replace....or even the exact operating sequence for the defrost cycle.

T,