A refrigeration column that runs its compressor nearly nonstop, without ever seeming to catch up to its set temperature, worries most owners into assuming the worst: a dying compressor or a slow refrigerant leak. Those do happen, but airflow problems inside the cabinet cause the exact same sign far more often and are a much simpler repair.
Why Airflow Mimics a Sealed-System Failure
The evaporator inside a refrigeration column needs a clear path for cold air to circulate, both across its own coil and out into the cabinet. Frost buildup on that coil from a defrost system running behind schedule, a blocked vent inside the cabinet, or shelves and bins packed tightly enough to block airflow can all starve the compartment of cold air even while the compressor itself works perfectly.
A Few Things to Check Yourself
Confirm nothing is blocking the interior vents, and check whether the back wall of the freezer or refrigerator section has visible frost buildup, which is one of the clearest signs of a defrost problem rather than a sealed-system one. Confirm the door is sealing flush all the way around, since a slow air leak forces the compressor to run constantly just to keep pace.
What Points Toward the Sealed System Instead
A compressor that runs hot to the touch, a condenser fan or coil area that feels unusually warm, or a faint oily residue near refrigerant line connections all point away from airflow and toward the sealed system, which is refrigerant-handling work for a certified technician only.
Column Pairs Share Refrigeration
On a refrigerator-and-freezer column pair, both units can be tied to the same refrigeration system depending on the model, so a problem affecting one side’s temperature is sometimes traceable to a shared part rather than something isolated to just that column.
A Thermometer Beats a Guess
An inexpensive appliance thermometer placed inside the cabinet for a day gives a far more reliable read on what is actually happening than judging by feel or by how food inside seems to be holding up. It can also help confirm whether the unit is missing its set point by a small, steady margin or swinging more widely, which is useful information to have ready when you describe the problem to a technician.
Kitchen Conditions Play a Role Too
A refrigeration column installed near a range, a dishwasher venting warm, humid air, or a spot that gets direct afternoon sun through a window works harder to hold its set point than an identical unit in a cooler, more isolated location, simply because it is fighting more ambient heat to begin with. That does not usually explain constant running on its own, but it is worth mentioning when you book, since it can compound whatever the underlying airflow or sealed-system issue turns out to be.
Booking a Diagnostic
Leave the unit running and powered rather than switching it off, since a technician needs to see the frost pattern and airflow in action to diagnose it correctly. Visit our Dacor refrigeration repair page to schedule a visit.