See also:

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. ...

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

Before driving your vehicle
Before entering the vehicle, remove any snow or ice from your shoes because that could make the pedals slippery and dangerous. While warming up the vehicle before driving, check that the acce ...