Freezer Running Constantly

Checks you can do safely before you call

1. Read the control and its mode lights. Turn off any Fast Freeze, Quick Freeze or similar mode and set the control to the middle of its range, then give the freezer a full day to settle before you judge the run time.
2. Size up the room. Feel the air around the freezer on a warm afternoon. A garage that bakes in summer, a sunny wall or a range next door all lengthen the run time. The use and care guide lists the room temperatures the model is designed for.
3. Vacuum the coils. Disconnect power at the plug or the breaker panel, then vacuum the coils on the back, or the vent and coils at the base, with a soft brush attachment, minding the sharp fins. Most chest freezers have no coils to clean, since the condenser runs inside the outer walls. Leave screwed-on covers alone. Get a helper for a loaded upright and slide it out slowly without tipping it, until it has the clearance the manual asks for, then restore power.
4. Check the seal with a flashlight. In a dark room, set a lit flashlight inside facing the door, close it, and look around the edge. Light showing through means a gap at that spot. A chest freezer lid can be tested the same way.
5. Listen for pauses. Over a couple of hours in a cool room, a freezer with a single-speed compressor should stop between runs. A variable-speed (inverter) model can run long at low speed by design, so check the manual. Note whether yours ever goes quiet, and roughly for how long.

When to call a technician

• It still runs nonstop a full day after the coils were vacuumed and the control was reset.
• The compressor never stops and the cabinet is warming anyway; see freezer not freezing.
• Frost has spread across the rear wall of a frost-free model; see freezer frost buildup.
• Looking through the base vent with a flashlight, hands out, you see the condenser fan standing still while the compressor runs.
• The breaker trips, or the cord or outlet feels warm. Switch off its breaker before you pull the plug, and leave the freezer off.

What happens at the diagnostic visit

The technician compares the cabinet temperature with the setting, checks the condenser and its fan, tests the thermostat or sensor and the control, and looks at the evaporator for a frost pattern that points to a defrost fault or a low refrigerant charge. The room gets noted too, because a freezer in a hot garage can run long with nothing broken, and you hear that before anything is replaced.

The diagnostic visit is $89 for a standard residential appliance and $129 for a built-in unit or commercial equipment; a premium brand on its own doesn't make an appliance built-in. You approve the repair price before work begins. More on chest, upright and built-in freezers: freezer repair.

Brand and model notes

• Frigidaire: models with a Fast Freeze button keep the compressor running for an extended period while it is on, so check for its indicator light first. See Frigidaire.
• GE and Frigidaire garage-ready freezers: both brands sell freezers marked garage-ready, designed for a wider range of room temperatures than a standard model. A standard freezer in a closed garage can run nearly nonstop through a hot spell with no failed part. See GE.
• U-Line and Sub-Zero undercounter units: undercounter freezers and freezer drawers breathe through the vent at the toe kick. A rug, a trim panel or packed dust across that vent traps heat under the counter and keeps the compressor running. See U-Line and Sub-Zero.
• Whirlpool: on frost-free uprights, long run times together with frost on the rear wall point to the defrost parts before the compressor. See Whirlpool.