How to Fix a Fridge Not Cooling
Last updated: 4 September 2026
Quick Answer
Check the thermostat setting, clean the condenser coils, and check the door seal.
Overview
A fridge that is not cooling can spoil food quickly. This guide covers diagnosing and fixing common cooling issues.
Step-by-Step Fix
Safety & Preparation
Before beginning any repair, ensure you have isolated power or water supplies. Clear your workspace, gather standard hand tools, and wear appropriate personal protective equipment (PPE).
- Firstly, locate your fridge's thermostat dial or digital control panel, usually inside the fridge compartment near the light. Ensure it's set to the recommended temperature, typically between 2°C and 4°C, and if it's currently set higher, adjust it to a colder setting before proceeding to other checks.
- For your safety, unplug the fridge completely from the mains power socket before you start any physical checks or cleaning. Carefully pull the appliance away from the wall or surrounding cabinetry, allowing sufficient space to access its rear and sides.
- Now, locate the condenser coils, which are typically found on the back of the fridge or sometimes underneath it, often behind a grille. Use a vacuum cleaner with a brush attachment to thoroughly remove any accumulated dust, dirt, or pet hair from these coils and the surrounding area, ensuring they are clear before moving on.
- To check the door seal, close the fridge door on a piece of paper and try to pull the paper out; if it slides out easily, the seal is weak. Repeat this test around the entire door frame to identify any gaps, as a faulty seal allows cold air to escape and warm air to enter, and replace it if it's loose or damaged.
- Once the fridge is plugged back in (after completing other checks), listen carefully for the low hum or gentle whirring sound of the compressor, usually coming from the bottom rear of the appliance. If you hear no sound at all after 5-10 minutes, or if it makes unusual noises, this could indicate a fault with the compressor itself, which typically requires professional attention.
- After performing all necessary checks and cleaning, plug the fridge securely back into the mains power socket. Allow several hours (at least 4-6) for the fridge to reach its set temperature, and use a thermometer inside the compartment to confirm it is consistently maintaining a cold environment before storing perishable food.
Common Symptoms & Diagnostic Resolutions
Review the common error codes and operating symptoms below to quickly identify the root cause of the fault before ordering replacement parts.
| Symptom / Code | Likely Root Cause | Recommended Resolution |
|---|---|---|
| Fridge not cooling | Dirty condenser coils | Clean the coils thoroughly. |
| Fridge warm | Faulty thermostat or compressor | Check thermostat and compressor. |
Frequently Asked Questions
Why is my fridge not cooling but the freezer is?
A faulty damper or thermostat controlling the fridge section.
Can I replace a fridge thermostat myself?
Yes, with basic electrical skills.