Temperature on a whirlpool D10 watercooler

The most likely cause is that you have a bad temperature sensor. Some wine coolers will display the set temperature, not actual temperature so although you set it for 58°, the temperature inside is much colder. If the temperature sensor is bad, then it's likely sending a signal to the control board that says it like 99° so the wine cooler is always trying to cool down to 58°. If you have an independent thermometer, put it in the wine cooler and see what it reads.

FYI, bad temperature sensor are pretty common in wine coolers. It's a design flaw that most manufacturers are just recently correcting.

First front seat the valve stem on the expansion valve (in all the way), then backseat the valve (out) six turns. Next pump the system down and change the drier, evacuate, open the "King-Valve" on the receiver and allow refrigerant to circulate. Rule of thumb (ole school) measure ambient temperature add 25*F convert this temperature to pressure for head pressure. Also check RLA (running load amperage).
Allow system to run about 2 hours then check TXV Superheat should be 6*F for low temperature.

no its the thermostat in it thats running out of true,,it telling the chiller the water is still to hot so the chiller freezes it some more,,change the thermostat its packed up,,

Check the fridge sensor. On my Hoover HNMF2805AL80 f/f, first I replaced control module - still freezing.
Have just replaced cheap fridge temperature sensor. Part No. 97061619. Trouble is you have to cut into insulation at back of fridge to replace. I just plugged in sensor & placed inside fridge at back at the bottom - so far so good, only lettuce freezing now, everything else v. cold but not frozen. :)

Viking wine coolers are made by Marvel.They all had issues with freezing the contents. If you replace the electronic cold control system it will be fine.If you don't, it will freeze the wine popping the corks and leaking in the unit.If you get the parts from Marvell they are much cheaper.

The heater has a timer, and a temperature sensor. It senses when the water has turned to ice the temperature has reached certain degree. If the sensor or the timer malfunction then you would end up with the heater coming on too soon and the ice would not have time to freeze.

Yes except if it has a temperature control but would cut off only when it has reached the desired temperature, and water coolers are not the efficiency compared to a heat pump or air-conditioning, it only cools the air with the water running over the pads so whatever the temperature of the water is that’s the temperature the cooler will cool the air to. so in theroy it will only drop the temprature 10 to 15 degrees.

The thermostat is suspect if the compressor is room temp and you do not have voltage at the compressor.
Do you have voltage at the compressor?

first of what temperature are you running is the refrigerator and also what is the ambient temp? whats happeneing is that the water resevour is freezing in the back of the refrigerator . So if the temperature is say 34 iit can actually be a lot colder in the regfriigerator than that due to temperature averaging. Thanks fpor using Fixya and Merry Christmas