A Quebec winter mystery. In cold weather, you will see cars with a small electrical cord sticking out of the front grille, plugged into a wall outlet. In the parking lots of condos, offices, or shopping centres, you sometimes find outdoor outlets (bornes) meant for exactly this. That cord is the block heater.
What it does. A block heater is an electric device that warms the engine, the coolant, and the oil before you start the car. The result: the engine starts more easily in the cold, the cabin warms up faster, and the engine wears less, according to CAA-Québec.
When and how long to plug it in. You should plug in the block heater as soon as the temperature drops below -5 °C, and it is strongly recommended in deep cold, at -15 °C or below, again according to CAA-Québec. Good news: 3 to 4 hours before leaving is enough — no need to leave it plugged in all night. Most block heaters plug into an ordinary 110-volt outlet using an extension cord.
Is it really worth it? Yes, on two counts. A plugged-in vehicle can use up to 15% less fuel, because its components are already warm at start-up. And an easier start spares the battery, which suffers badly in deep cold. Not every vehicle comes with a factory block heater, but a garage can install one.
Good to know for newcomers. If your car has a small cord poking out of the grille, don't cut it: it is the block-heater cord. Check whether your building or workplace offers outdoor outlets, and keep an outdoor extension cord handy. For the rest of the cold season, see our guide to surviving the Quebec winter.




