How do you bleed Subaru Outback 3.0 heater system?

To bleed the heater system on a Subaru Outback 3.0, start by ensuring the engine is cool, then remove the radiator cap. Next, run the engine with the heater set to maximum heat and the fan on, allowing air to escape from the system. Monitor the coolant level in the reservoir and add coolant as necessary to maintain the proper level. Finally, check for heat in the cabin to confirm that the system is properly bled.