Refrigerator Running Constantly? Why It Never Shuts Off
A refrigerator is supposed to rest. Healthy units cycle on and off through the day, and a compressor that hums around the clock is announcing that it can no longer win: something is adding heat faster than it can remove it, or its cooling capacity has quietly eroded. Constant running is the early-warning version of the not-cooling call, caught while the milk is still cold, and it is worth acting on for two selfish reasons: it is inflating your electric bill every hour, and it is wearing out the most expensive part in the machine.
The heat you are adding
Start with load and environment. A big warm grocery haul, a heat-wave kitchen, a unit jammed against a wall with no clearance, or doors opened forty times an hour by a summer household all legitimately demand long run times, and a day of nonstop running around those events is normal. Constant running on an ordinary week is not.
The seal you cannot see leaking
A tired door gasket admits warm, humid air continuously, and the fridge runs continuously to fight it. Run the paper-strip test around both doors, clean the gaskets, and check the door swings shut on its own from a few inches. Interior condensation and frost creep are the gasket's confession.
The capacity you have lost
Dust-blanketed condenser coils and a lazy condenser fan cut the system's ability to shed heat, so it compensates with runtime, often for months before temperatures slip. Unplug, clean the coils, confirm the fan spins. Inside, a frost-buried evaporator from a defrost fault strangles airflow the same way, with the telltale frost sheet on the freezer's back wall; that story and its parts live in our not-cooling guide, of which this symptom is the opening chapter.
The sensors that misreport
A drifted thermistor can tell the control the cabinet is warm when it is not, commanding endless running and over-freezing the fresh-food section, lettuce turning to glass is the classic clue. The mirror fault, genuine slow capacity loss in the sealed system, produces the same endless running with slowly slipping temperatures. Both are meter-and-gauge diagnoses.
What to do this week
Clean the coils, test the gaskets, thin out any airflow-blocking overpacking, and give it two normal days. Then listen at a quiet moment: a fridge that now rests is fixed; one that still never stops has earned a diagnostic visit while the problem is still cheap.
When to book
Book when runtime stays constant after the checks, when frost patterns or over-freezing appear, or when the bill jump has no other explanation. Appliance Surgeon provides refrigerator repair across the area, including Reston and College Park.