Checking the operation of heating and ventilation (Mitsubishi Colt 4)

Move the regulator all the way to the right with the engine warm and check if hot air comes out.

Check that the directional air supply device at the top and bottom is functioning.

Turn the heater control in the opposite direction; after a short time, only cold air should start coming out of the hole; otherwise, the air damper does not close completely.

Check if warm or cold air is coming out of all the openings.

Check if the fan works in all modes.