Maytag Refrigerator Running Constantly? Causes

Most Likely Cause#

A Maytag refrigerator that runs without ever cycling off is most often fighting a heat load it cannot beat — and the two usual culprits are dirty condenser coils that can no longer shed heat, and a failed door gasket letting warm air pour in. Behind those are a defrost system failure icing over the evaporator, a temperature sensor lying to the control board, and a slow refrigerant leak bleeding away cooling capacity.

First, make sure the run time is genuinely abnormal. In a hot kitchen or garage the compressor working most of the hour is normal, and after a big grocery load or a power outage it may run for hours straight to catch up. The real warning sign is a compressor that runs around the clock with no cycling off, or one that runs while the inside is already cold enough.

Disconnect power before cleaning coils or reaching behind the unit — the condenser fan can start without warning when the compressor cycles. Maytag French-door models are heavy, 250 to 350 pounds loaded, and the water line has little slack, so pull the unit out carefully and keep the rear vents clear while you work.

What Usually Causes It#

Dirty condenser coils — start here#

The condenser coils dump the heat pulled from inside the fridge, and when dust, grease, and pet hair coat them the heat has nowhere to go, so the compressor runs longer and longer trying to keep up. On Maytag French-door (MFI) and side-by-side (MSS) models the coils sit behind a lower rear access panel; some top-freezer (MRT) models have them exposed on the back. Pull the unit out, brush the coils with a coil brush, and vacuum them. If the compressor starts cycling normally within a few hours, dirty coils were the whole problem — and homes with shedding pets need this done more often.

Gasket, defrost, sensor, and refrigerant#

A hardened or cracked door gasket lets humid air infiltrate faster than the fridge can remove it, so it never stops; run the dollar-bill test at the corners and mid-points of each door, and on a French-door check the center mullion. A defrost failure is distinctive — the compressor runs non-stop and the interior slowly warms over days as ice encases the evaporator, with frost showing at the freezer vents. A failed thermistor is the opposite: the box is actually at or below setpoint, but a false-warm reading keeps the compressor running, so confirm the real temperature with an independent thermometer. And a slow refrigerant leak drops capacity gradually — look for oily residue on the lines and a suction line that is cool rather than cold; that repair needs a certified technician. Maytag backs the sealed system with a 10-year warranty, so a leak in the compressor, evaporator, condenser, or tubing may be a parts-covered repair.

Diagnostic Sequence#

1. Confirm the run is truly abnormal — not just summer heat, a fresh grocery load, or an outage recovery.
2. Pull the unit and clean the condenser coils, then watch for normal cycling over a few hours.
3. Run the dollar-bill test around both doors and check the French-door mullion.
4. Pull the freezer rear panel and look for ice encasing the evaporator.
5. Compare an independent thermometer reading to the setpoint to catch a lying sensor.
6. Look for oily residue and a not-cold suction line that suggest a refrigerant leak.

Repair or Replace#

Cleaning the coils costs nothing and resolves the most common case. A door gasket, a defrost heater or thermostat, and a temperature sensor are moderate parts. A refrigerant leak is the expensive, certified-technician repair — but it is also where Maytag's 10-year sealed-system warranty may cover the parts, so check your coverage before paying out of pocket. A compressor forced to run non-stop wears out early, so it is worth fixing the cause promptly; you can book a visit to have the defrost, sensors, and sealed system checked in one trip.

FAQ#

The questions we hear most about a Maytag refrigerator that runs constantly are below.