See also:

What to do if...
Only a black screen is visible. Switch on the system. There are no options available on the screen. Replace remote control batteries. Radio stations or TV channels are grayed out and c ...

Tone
The sound settings are stored for the remote control currently in use. ...

External temperature
External temperature warning If the display drops to +37 ℉/+3 ℃, a signal sounds. A Check Control message is displayed. There is the increased danger of ice. Ice on roads Even ...