Food freezing in a fridge is a common appliance problem that can ruin fresh produce, dairy, and other temperature-sensitive foods. The most common causes are easy to identify and in many cases easy to resolve without professional repair.

Thermostat Set Too Low

The most common cause of a fridge freezing food is simply that the temperature setting is too low. Fridge thermostats are typically numbered from 1 to 7 or from 1 to 9, with higher numbers usually meaning colder, though some models are the reverse. The recommended temperature for a fridge compartment is between 1 and 5 degrees Celsius. If the thermostat dial has been inadvertently turned toward the colder end, the fridge may be operating below zero and freezing food. Try adjusting the thermostat dial to a warmer setting and monitor for 24 hours.

Faulty Thermostat

If the thermostat is already set at a moderate level and the fridge is still freezing food, the thermostat itself may have failed and be sending the compressor running continuously rather than cycling on and off as it should. A faulty thermostat typically requires replacement, which is a straightforward repair that an appliance engineer or a competent DIYer with a compatible replacement part can carry out. Replacement thermostats are available for most fridge models.

Blocked Airflow

Modern frost-free fridges circulate cold air from a freezer compartment through vents into the fridge section. If the vents are blocked by food items placed directly against the back wall of the fridge, air circulation is disrupted and the areas near the vents become much colder than intended. Ensure food is not packed against the rear wall and that air can circulate freely throughout the fridge compartment.

Faulty Door Seal

A damaged or dirty door seal that does not close properly allows warm moist air to enter the fridge, which causes the thermostat to run the compressor more frequently and for longer, making the fridge colder than intended. Check the door seal by closing the door on a piece of paper; if the paper slides out easily, the seal is not gripping adequately. Clean the seal with warm water and mild detergent and check for any tears or deformities. A damaged seal can be replaced.

Summary

A fridge that freezes food is most commonly caused by the thermostat being set too low, a faulty thermostat running continuously, food blocking airflow vents at the rear of the fridge, or a door seal that is not closing properly. Adjusting the thermostat is the first step. A faulty thermostat requires replacement. Clearing airflow obstructions and ensuring the door seal is clean and intact resolves the remaining common causes.