7 replies to this topic

[deezus]

This unit was getting warm in top of freezer area and the cold control had to be turned up in order for it to cool. Tested cold control it passed. I notice a thin line of frost forming on center of freezer wall on evaporator cover. This didn't happen all the time. So, we replaced the adaptive defrost timer. work3d for a week now its doing the same thing. So either a bad timer again or a faulty cold control ? Even though CC tested fine? Any help would be appreciated. Also, ohmed out compressor and it tested fine. Thanks.

[RegUS_PatOff]

... thin line of frost forming on center of freezer wall on evaporator cover.

OR bad Defrost Heater or Defrost Terminator Thermostat ..

OR possibly leaky Sealed system

Evaporator frost pattern pictures may help

[deezus]

Evaporator has even frost pattern, Bimetal and board have been replaced, What happens is the evap fan stops running and the freezer starts getting warm. Then if you turn the CC up it comes on again. But if I test the CC it tests fine......im just wondering if a CC can have intermittent failings? Like worok sometimes and other times not and the same when you test it? As I understand it the evap fan on this model should constantly be running right?

[RegUS_PatOff]

....im just wondering if a CC can have intermittent failings?

... As I understand it the evap fan on this model should constantly be running right?

1) yes

2) both Fans should be running whenever the Compressor is running

 

http://www.repaircli...sp?R=154&N=2299

[deezus]

Ahh, so the cold control being bad turns off the compressor and the fans?

[RegUS_PatOff]

yes

Wiring Sheet - 2200277.pdf

[Budget Appliance Repair]

That is actually one of the more common failure modes of a cold control to be intermittent.

 

If you pull the old one apart after you replace it, I can pretty much guarantee that you will find the contact points look quite crispy and melted.

 

One good way to know this is your problem is when you find that the unit it off and starting to thaw out, don't turn or touch the control dial, just give the control area a good slap and if it starts when you do that you can be pretty much assured you have a bad cold control, (the jolt or turning it up or off/on will make the contacts connect again until it opens and tries to close on its own).

Edited by Budget Appliance Repair, 17 December 2012 - 07:12 AM.

[Scottthewolf]

You might also find black dust around the cold control if it's going bad.