Pull Over Safely
Turn off AC, set heater to max, and coast to a shoulder.
Do Not Open Cap Hot
Let it cool before adding coolant—risk of burns.
Next Moves
Call for a tow if heat returns quickly; you may have leaks or fan failure.
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FAQ
Add water? In a pinch—replace with proper mix soon.
Drive while hot? No—risk head gasket failure.
Raleigh Auto Advisor