What could happen if someone doesn’t let an engine warm up?
In: Engineering
People have mentioned what is happening inside the engine, there is a practical safety concern. If you don’t warm up your car, your windshield defroster won’t work. The interior heat is waste heat from the engine. Even if you scrape frost off of the windshield, your breath can condense on a cold windshield and blind you.
You don’t have to warm your car up for very long. If the windshield is clear when you get in, it won’t fog up immediately, and your engine generates heat quickly while you’re driving. But the defroster is a safety system, it is considered bad luck to drive blind. Warm up your car so that the defroster can work.
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