See also:

Temperature
High temperatures accelerate the rate of corrosion to those parts which are not well ventilated. ...

Battery
If the battery is not fully charged during extremely cold weather conditions, the battery fluid may freeze and damage the battery. To maintain maximum efficiency, the battery should be checked ...

Operating the HomeLink universal transceiver
The HomeLink Universal Transceiver (once programmed) may now be used to activate the garage door, etc. To operate, simply press the appropriate programmed HomeLink Universal Transceiver button ...