why does my Skoda Octavia's fan run constantly?

Solution

1. Preparation

• Gather tools: OBD-II scanner, multimeter, socket set, and a wiring diagram.
• Disconnect the battery to ensure safety while working on electrical components.

2. Replace the Faulty Temperature Sensor

1. Locate the temperature sensor, typically near the thermostat housing.
2. Disconnect the electrical connector from the sensor.
3. Remove the sensor using a socket wrench (typically 19mm).
4. Install the new temperature sensor and tighten to the manufacturer's specifications (usually around 15-20 Nm).
5. Reconnect the electrical connector securely.

3. Check/Replace the Fan Relay

1. Locate the relay in the fuse box (refer to the owner's manual for exact location).
2. Remove the faulty relay and inspect for damage.
3. Replace with a new relay, ensuring it matches the original part number.
4. Reassemble the fuse box cover.

4. Reconnect Battery and Test

1. Reconnect the battery terminals securely.
2. Start the vehicle and allow it to reach operating temperature.
3. Monitor the fan operation to ensure it cycles appropriately.