Why does your car smell like burning rubber when you turn the heat on?

A burning rubber smell when you turn on the heat in your car could indicate that a rubber component, such as a belt or hose, is coming into contact with a hot surface or is fraying. It could also mean that debris, like leaves, is caught in the heater or air intake system and is burning. Additionally, a malfunctioning part in the heating system, such as the blower motor, could be overheating. It's advisable to have your vehicle inspected to determine the exact cause.