Why is my Siemens fridge not cooling but freezer is fine?

Siemens Fridge Warm but Freezer Cold? (Durban Repair Guide)

For residents in Durban, a functioning refrigerator is essential. From the sticky humidity of summer to the cooler winter months on the KZN coast, maintaining a consistent internal temperature is critical to prevent food spoilage.

However, Siemens owners often encounter a specific and confusing issue: the freezer compartment functions perfectly, yet the main fridge section remains warm (often exceeding 10°C).

The positive news is that the compressor working. The issue typically  is  with the internal airflow system. This guide will help you diagnose the cause of this circulation failure and determine when professional assistance is required in the KwaZulu-Natal region.

How does a Siemens fridge work?

In order to grasp why one half of your appliance is working while the other is failing, you must first understand the single-loop cooling architecture used in 90% of modern Siemens fridge-freezers.Unlike older commercial units that might have two compressors, your residential Siemens unit likely relies on a single evaporator system.

The damper

At the entry point to the fridge section, there is a small motorized door called the air damper.

• When the fridge is warm: The thermostat signals the damper to open, allowing the fan to push cold air from the freezer into the fridge.
• When the fridge reaches 4°C: The sensor signals the damper to close, stopping the airflow to prevent freezing your milk and vegetables.

The Diagnosis: If your freezer is cold but your fridge is warm, the cold air is being created successfully, but it is physically unable to travel to the fridge section.