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Checking Radiator Fan Thermostat

Model: Mini Mini R53, R52, R50 - Years 2001-2007
Part: Thermostat

The radiator for cooling the engine coolant is equipped with a cooling fan. While driving, cooling occurs through the airflow passing through it, but during stops, this airflow ceases, so the fan activates to generate airflow and cool the radiator. The fan is usually activated by a thermostat located on the radiator or the coolant outlet pipe. Using a standard multimeter, you can check the correct operation of the thermostat. By placing the probes of the multimeter on the thermostat contacts, you can verify its proper functioning. When the engine is cold, the meter should show no resistance, while when the coolant heats above 90 °C, the meter should indicate 0 ohms. Different readings suggest immediate replacement of the thermostat.

Updated on 6 February 2026 by ScegliAuto

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