On a mid-market refrigerator, one warm compartment usually means air is not moving. On a Thermador, Monogram or Dacor column, or a professional side-by-side, it very often means one of the two refrigeration systems in the cabinet has stopped entirely – and the other one carrying on perfectly is exactly what you should expect.
Two systems, one cabinet
Dual refrigeration was the point of the design. A separate compressor, evaporator and fan for the fresh food side, and a second set for the freezer. That is why humidity in the fresh food compartment is so much better than a shared-air box, and it is why one side can fail completely without the other noticing.
So the first question is not what has broken but which system has, and that is answered by listening and measuring before anything comes apart.
What we find, roughly in order of cost
- The evaporator fan on that side. The cheap outcome, and common.
- A defrost drain frozen solid. Also cheap, and it returns if it is only thawed rather than cleared and reclipped properly.
- The defrost heater or its thermostat. Ice closes the airway over a week or two, which is why these arrive gradually.
- A leak in that sealed system. The expensive one. Recovery, repair, evacuation and a weighed charge, all of it under EPA 608 certification.
Why the diagnostics matter more here
Getting the answer wrong on a freestanding refrigerator costs a part. Getting it wrong on a column that is plumbed, panelled and screwed into a run of cabinetry costs a day of labor as well, because reaching the back of the unit is most of the job. That is the reason we measure first and quote second on these, never the reverse.
What you can look at first
Open the warm side and look at the vents. Visible frost across them points at defrost or drain. Clear and dry vents with no air movement when the door switch is held in points at the fan. Both sides drifting together is neither: that is a condenser nobody has cleaned.
Do not run it warm for a fortnight hoping. A system short of refrigerant works its compressor far harder than it was built for. Call (844) 398-4960.
