Frozen & seized locks in Canada
Seized winter locks opened without the forced key or cracked glass that follows hot water. Pick a city to see what each business states it charges, and when it last said so.
Cities
A properly Canadian call-out. Moisture inside a cylinder freezes, or a car door seal bonds to the frame, and the lock stops turning. Most of these are minor jobs that become expensive because of what people do before calling.
Force is what does the damage. A key snapped inside a frozen cylinder turns a small problem into an extraction and often a new lock, and boiling water poured on a car door refreezes deeper and can crack glass. If the key will not turn, stop turning it.
Prevention is cheap: a graphite or PTFE lubricant before winter, not oil, which holds moisture. Ask your locksmith which one for your lock while they are there anyway.