Refrigerator Not Cooling? Troubleshooting Guide

1. Vacuum the condenser coils

Coils packed with dust and pet hair are the #1 cause of "fridge won't cool" calls. Pull the unit forward, unplug it, and vacuum the coils (bottom-rear or bottom-front, behind the kick plate). Do this every 6–12 months — more often with shedding pets. After cleaning, give the fridge 24 hours to recover before deciding it's still broken.

2. Freezer works but the fridge is warm

This pattern almost always means the evaporator fan (inside the freezer) has failed or iced over, so cold air isn't circulating into the fresh-food section. Open the freezer and listen — if you hear no fan noise while the compressor is running, the fan motor or the defrost system needs service. A sheet of frost on the back wall of the freezer points to a defrost heater or defrost thermostat failure.

3. Water pooling under the fridge

A clogged defrost drain is the usual culprit — melted frost overflows the drain pan and drips onto the floor. On most models the drain opening is at the back of the freezer floor. Clear it with warm water and a turkey baster; if it clogs again within weeks, the drain heater or a check-valve is failing. Water at the front of the fridge usually means the water-line fitting or ice-maker supply tube is leaking.

4. Loud noises

A rhythmic click-and-hum every few minutes is a failing compressor start relay — a common, inexpensive part. A steady grinding or chirping usually means the evaporator or condenser fan bearings. Rattling that stops when you press on the back panel is usually just the drip pan or coils vibrating; slide the fridge and reseat the pan.

5. Ice maker not making ice

Check the shutoff arm or ice-level sensor (many models pause when the bin registers full). Confirm the water supply valve behind the fridge is fully open and the inlet screen isn't clogged. A freezer that's too warm (above 10°F) won't cycle the ice maker — fix cooling first, ice second.

6. Check the door seals

Close the door on a dollar bill; if it slides out with almost no drag, the gasket is leaking cold air and the compressor is running constantly. Clean the gasket with warm soapy water first — sticky spills often cause false failures — and replace the gasket if it stays deformed.

When to call a pro

Call for service if the fridge is still warm 24 hours after cleaning the coils, if the freezer has visible frost on the back wall, if you hear the compressor clicking on and off every few minutes, if water keeps pooling after clearing the drain, or if the unit is silent when plugged in. Sealed-system diagnosis, compressor and relay replacement, and defrost-system repair need a certified technician.

Knapp's Service & Appliance Repair diagnoses and repairs refrigerators throughout Portland and the surrounding Oregon communities we cover. Submit a service request with the make, model, and symptom (warm fridge, leak, noise, ice maker) and we'll follow up.