diagnose this with a book... everyone should have a manual for their vehicle, and the library should have a professional manual available...in the reference section, you'll have to make copies of the important sections...good luck :)
It is probably the sound of the defroster fan.
Electrically heated seats, wing mirror defrosters and rear window defroster.
The 1953 Lincoln was the first car that had a rear window defroster. It also was the first car to have an optional 4 way power seat.
Pour hot water (not boiling) over the key hole and door seams, gain access immediately and turn on defroster and turn heat
It should if the system is in good working order.
One can remove rime from a wind shield by turning on the car and turn the heat to high and defroster to low. After it has some time to warm up one can take an ice scraper and de-icing solution to break off the ice.
windshieldwheelwater pumpwindowwindow defroster
that would be the car turning because the car that had to swerve to avoid it hit another vehicle due to the turning car's failure to yield.
First you start the car. Then you let it idle or drive it until it reaches operating temp. Finally you turn the heater on to the defrost setting.
The engine would heat up quicker without the heater on but ever so slightly, so it probably doesn't matter.
This is to provide electrical current to heat the thin strips.
it is probably a bad heater core