What Causes a Fridge to Freeze Everything? Diagnosis & Fix

If your fridge is turning vegetables to ice, freezing milk, or forming frost on shelves that shouldn't have it — something is wrong. Here are the most common causes and how to fix them.

1. Thermostat Set Too Cold

How to check: Look at the temperature dial. The fridge section should be set between 1°C and 4°C. If it's set at 1 or 0, you may be on the edge of freezing.
Fix: Set the dial to 3–4°C (or the equivalent mid-range setting on the dial) and check again after 24 hours.

2. Faulty Temperature Control Thermostat

Symptoms: Fridge runs constantly even when it's already at temperature, food freezes despite correct setting
Cause: The thermostat that tells the compressor to stop has failed
Fix: Requires replacement — a technician can diagnose and replace this part for $80–$200

3. Blocked Air Vents Inside the Fridge

Symptoms: Items near the vents (back wall or sides) freeze, rest of fridge is normal
Cause: Cold air from the freezer section is blowing directly onto items
Fix: Rearrange items so they don't block or sit directly in front of internal air vents

4. Faulty Damper Control

Symptoms: Too much cold air flowing from freezer to fridge
Cause: The damper (a flap that controls airflow between sections) is stuck open
Fix: Requires a technician

5. Faulty Main Control Board

Symptoms: Random freezing, compressor runs continuously, temperature inconsistent
Cause: The electronic control board that regulates all fridge functions has failed
Fix: Control board replacement ($150–$400) or replacement if the fridge is older

When to Repair vs Replace

If your fridge is under 7 years old, repair is usually worth it. Over 10 years old with control board or compressor issues, replacement is usually better value. We sell a wide range of certified pre-owned fridges starting from $299 with a 3–6 month warranty.

Call (02) 9757 4888 for advice.