why does my Tesla Outback’s fan run continuously after shutting off?

Solution

1. Preparation

• Gather tools and parts: OBD-II scanner, multimeter, socket set, cooling fan relay, cooling fan control module (if faulty).
• Ensure the vehicle is parked on a level surface and the engine is turned off. Disconnect the battery to prevent electrical shock.

2. Inspect Cooling System

• Check coolant levels in the reservoir and radiator. If low, refill with manufacturer-recommended coolant.
• Inspect for any visible leaks in hoses and connections. Repair or replace any damaged components.

3. Test and Replace Components

• Thermostat:

  • Remove the thermostat housing (usually requires socket set).
  • Check if the thermostat opens in hot water (test with boiling water).
  • Replace if it does not function correctly.

• Fan Relay:

  • Locate the fan relay in the fuse box.
  • Use a multimeter to test for continuity.
  • Replace the relay if it fails the test.

• Fan Control Module:

  • Disconnect the fan module connector.
  • Test the module for proper voltage and ground using a multimeter.
  • Replace the module if it shows signs of failure.

4. Reassemble and Reconnect

• Reinstall any components that were removed during inspection and testing.
• Reconnect the battery and ensure all connections are secure.