What is the function of a Blend Door?

Using an Expedition, Helming’s Auto Repair demonstrates the function of a blend door in regulating temperature inside a vehicle.

Video Transcript

Alright this is the A/C evaporator cooler

This is the heater cooler

This is a blend door that separates the two so you get your hot or cold air

It goes in that slot there

So you can get either hot or cold or anywhere in between based on how far this door is open