How do you change the heater fan in a 1997 Previa?

To change the heater fan in a 1997 Toyota Previa, start by disconnecting the battery to ensure safety. Remove the glove box and any surrounding paneling to access the blower motor located behind the dashboard. Disconnect the electrical connectors and unscrew the blower motor from its mounting. Replace it with the new fan, reassemble the panels, and reconnect the battery.