What Post Falls builds for in winter
The City of Post Falls Building Division's sheet of adopted codes and design criteria, revised Feb. 16, 2025, lists a winter design temperature of 25°F for outdoor air, which is reason enough to check the corner where a cooler stands each winter. Indoors, a basement or an unheated spare room can still fall below the 50°F floor that some coolers' manuals set, and only a thermometer set beside the cooler, outside the cabinet, shows whether yours does.
25°F
winter design temperature, City of Post Falls Building Division, sheet revised Feb. 16, 2025
50°F
bottom of the room range in the manual quoted here
Fifty matters because of the manual. Wine Enthusiast's manual for its Prestige XL 250, a compressor-cooled unit, says it “should be placed in a location where the ambient temperature is between 50-109° Fahrenheit” and that it “was not designed to operate in temperature settings below 50° Fahrenheit.” It adds that “placing your unit in extreme cold or hot conditions may cause interior temperatures to fluctuate,” and it warns against “any location not properly insulated or heated.”
Why a cold corner can quiet a cooler
A compressor cooler's thermostat starts and stops the compressor, and the manual lists its click as one of the normal sounds. A cold room interrupts that cycle. Whynter's manual for its BWR-541STS, a built-in compressor model, says: “The internal temperature of this unit will not rise if the ambient temperature where the unit is located is lower than the set temperature.” In a space colder than its setting, such a cooler has no reason to start the compressor, and the bottles cool toward the surrounding air. On a reading alone, that can pass for a failed thermostat or a dead compressor.
For wine that seems too cold, the Prestige troubleshooting guide has a single line: “If temperature control setting is too cold, adjust to a warmer setting.” That answers a setting chosen too low. It does little for a cooler standing in air below its setting, where a warmer number only gives the compressor less reason to start.
When the cooler is the problem
If the space around it is within its maker's stated range and the cooler still will not keep its setting or runs without stopping, the cause is most likely in the cooler. For a blank display, check that the cooler is plugged in and that its outlet has power at the circuit breaker. The usual faults on these units are listed at Wine and Beverage Cooler Repair.