Yes, but its only for masochists. Unlike a Mondeo, its not just a digital panel, a flapmotor, some sensors, and pneumatics. Some people also say the actual control logic is quirky/poor.

In addition to the digital panel, sensors, its a different heater box and loom with all flaps controlled by stepper motors. To swap the heater box means removing virtually everthing in front of the seats. That's a couple of days work.

A few have done it , but most listen to the advice and look for Climate Control already fitted in their next Focus.

Martin