Checking the operation of heating and ventilation (Hyundai Elantra J1)

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

Check if the top and bottom air directional device is functioning.

Turn the heater control in the opposite direction; after a short time, only cold air should start coming out of the holes; 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.

[The original can be read on the resource www.hyundaibook.ru]