See also:

If steam is coming from the engine compartment
Turn off the engine and get everyone away from the vehicle until it cools down. ...

Cleaning the interior
Use a soft, damp cloth to clean the climate control panel, audio equipment, instrument panel, center console, combination meter panel, and switches. (Do not use organic solvents.) ...

Lubrication oil circulation in the refrigerant circuit
Operate the air conditioner compressor at a low engine speed (at idle or low driving speeds) a few minutes each month during the off-season to circulate its oil. ...