How Vehicle Ignition Problems Start — and Why They Get Worse
Most ignition problems develop gradually. The ignition cylinder contains a set of spring-loaded wafers or pins that align with the cuts on your key. Over thousands of start cycles, those wafers wear down, the key itself develops micro-abrasions, and small debris — pocket lint, metal shavings, broken key fragments — work their way into the cylinder. The result is a key that turns harder each week until one morning it simply refuses to rotate at all. Rochester drivers who rely on a single key for years, or who frequently use a heavily weighted keyring that puts lateral stress on the ignition barrel, tend to see this problem arrive earlier than expected.
Cold temperatures accelerate the process. When temperatures drop well below freezing — as they regularly do from December through February across the Rochester metro area — metal contracts, lubricants thicken, and a cylinder that worked fine in October can feel nearly immovable in January. Attempting to force a stuck ignition is one of the most common causes of a snapped key inside the cylinder, which turns a manageable repair into a more complex extraction and replacement job. The safest step is to stop applying force and call a professional immediately.