Hell...here in Winnipeg we've already had -30 this winter!
There will most certainly be a pre-heat requirment prior to launching but that's tyical of GA
avionics. They normally have a min operating temperature of not less than -20C.
I'm waiting to hear about the first display that was cracked or melted when someone fires up a "herman" and points it at the panel!
One thing that your geographical location reminded me of was just how narrow-minded some of the avioncs manufacturers are these days with respect to northern operations.
Many of the packages (including the current Garmin suite) have integrated attitude, heading, and atttitude sensors that can't be deslaved. This precludes operation in Northern Domestic Airspace unless you add a good old steam driven DG
to the panel.
Still others fail to provide cold temperture ground clearance correction to VNAV and TAWS functions. So there can be errors of the magnitude of over a thousand feet at cold temperatures without the pilot knowing it!
And like you mentioned, much of th GA
stuff coming out has a min operating temperature that limits the installation of even normally remote mounted boxes to temperature and pressure controlled locations!
They should design avionics in the Arctic...not the tropics.