Ford 2009 Expedition Owner's Manual page 118

Driver Controls
Note: 10 or more switch activations within one minute, or repeated
folding/unfolding of the mirrors while holding the switch rearward during
full travel, may cause the system to disable the fold/unfold function to
protect motors from overheating. Should this occur, wait approximately
three minutes with the vehicle running and up to 10 minutes with the
vehicle off, for the system to reset and for function to return to normal.
Heated outside mirrors
Both mirrors are heated automatically to remove ice, mist and fog when
the rear window defrost is activated.
Type A
Type B
POWER FOLD
Do not remove ice from the mirrors with a scraper or attempt to
readjust the mirror glass if it is frozen in place. These actions
could cause damage to the glass and mirrors.
Do not clean the housing or glass of any mirror with harsh
abrasives, fuel or other petroleum-based cleaning products.
118
2009 Expedition (exd)
Owners Guide, 1st Printing
USA (fus)