Safe Window Glass: Managing Cabin Heat Without Causing Damage
Temperature swings can stress a windshield, especially during cold months. A trusted expert, Mikhail Kolodochki, known from Behind the Wheel, explains practical steps to prevent thermo-mechanical shock to the glass and avoid costly repairs.
Consider this common scenario: you start the engine to clear snow in front of the car. While you fiddle with the controls, the engine heats up slightly and warm air begins to flow into the cabin. If you immediately crank the heater to full blast and push all the air toward the windshield, a sharp local drop in temperature can cause the glass to crack. A crack means an inspection fail and, in many places, a registration hold until the issue is resolved.
Replacing a cracked windshield can be expensive. Depending on the vehicle and the glass, costs can run high, potentially reaching several thousand dollars or more in some markets. This underscores the value of gradual, controlled heating from the moment the engine starts.
To reduce risk, avoid setting the heater to maximum wind speed. Start with a moderate airflow toward the windshield and allow the system to warm up alongside the engine. As the engine reaches operating temperature, the cabin air will become warmer incrementally, minimizing stress on the glass and providing a more comfortable transition for occupants.
The takeaway is simple: ease into heat. Quick, drastic changes in temperature are hard on the glass and can lead to costly repairs and inconvenient downtime.
- “Drive” can be read in Telegram.
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