Door Lock Heaters?

[Kneale Brownson]

You only need to hold the door handle up for a brief period to activate the
lock heaters.  They operate at around an ambient temperature of freezing
and stay on according to how cold it is.  They will stay on for about a
minute and a half.  You can reactivate them after they have gone off if the
lock remains frozen.  I've  never had a frozen lock not become workable
after the first activation.

At 11:50 PM 12/20/2004 -0600, Matt Evans wrote:
>Car is an 88 90Quattro.
>
>Allegedly, this vehicle has door lock heaters.
>
>
>How do they function?   It was quite chilly here earlier this week and my
>lock cylinders were not at all cooperative.  I bought one of those cans of
>lock cylinder de-icer and they've been nice ever since (but its also been
>warmer).
>
>
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