How do you replace fan switch 2006 E250?

To replace the fan switch on a 2006 E250, first disconnect the negative battery cable to ensure safety. Remove the dashboard panel or any trim that obstructs access to the switch. Disconnect the wiring harness from the old switch, then remove it by unscrewing or unclipping it. Install the new switch by reversing these steps, ensuring all connections are secure before reattaching the dashboard panel and reconnecting the battery.