Viking VUAR140D Beverage Refrigerator Freezing

[gaspower]

Model: Viking UAR140D Beverage Refrigerator

My refrigerator has just started freezing all my drinks. So, normally in the past with my beverage refrigerators it has always been the thermostat module (PW240028 (Viking) Refrigerator Thermostat Control Kit). I replaced it and seems to still be the same problem, even at the lowest setting "1", it is showing 32-34 degrees, and has gone down to 20 degrees. I checked the fan, runs fine, there is no dust buildup on the coils. What else should I be trying to find causing this low temperature.

Best Regards, JR

[Nathaniel Peterson]

8 hours ago, gaspower said:

Model: Viking UAR140D Beverage Refrigerator

My refrigerator has just started freezing all my drinks. So, normally in the past with my beverage refrigerators it has always been the thermostat module (PW240028 (Viking) Refrigerator Thermostat Control Kit). I replaced it and seems to still be the same problem, even at the lowest setting "1", it is showing 32-34 degrees, and has gone down to 20 degrees. I checked the fan, runs fine, there is no dust buildup on the coils. What else should I be trying to find causing this low temperature.

Best Regards, JR

Could be start of a sealed system issue.If I recall an all refrigerator is an overcharged freezer and if it low it'll start freezing. But I would think the control would turn it off before that. Is the start overload working correctly? Try checking the new control, maybe you got a dud? Not likely unless it came from eBay lol.

[gaspower]

Hello,

Thank you I will check.

[Jeanne Knight]

Given your Viking refrigerator is freezing despite replacing the thermostat module, there could be other components at fault. One potential culprit could be the defrost timer, which could be causing the fridge to cool continuously if it's malfunctioning. Another possible issue could be the temperature control board which, albeit less common, could cause overcooling if it's not functioning properly. The damper control assembly might also be at fault; if it's stuck open, it could be allowing too much cold air into the refrigerator section. Lastly, check the thermistor which monitors the fridge's temperature. If it's giving incorrect readings to the control board, this could result in overcooling. If all these components check out and the issue persists, it may be best to consult with a professional technician.

[gaspower]

Hello Jeanne,

Thank you for the reply. I believe on this unit, the thermostat (PW240028) is all in one including the defrost timer and temperature control board, as I do not see any separate defrost timer or control board.

https://allvikingparts.com/v/vspfiles/downloadables/VUAR140.pdf

The evaporator panel seems to frost evenly, and I do not see any frost build up meaning a leak.

The only item I can see is the thermistor. Is there a way to test the thermistor to verify it is in working order.

Thank you JR