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Q: Heater only blowing cold air

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The Heater in my car won't work, but blows cold air.

A: This can be caused by a number of things. I...

This can be caused by a number of things. I’ll start by checking the coolant level in the engine. If the coolant level is low, then this will occur as the coolant will not go into the heater core. If the coolant level is fine, then it may be a blend door motor. These are located under the dash, and they open and close the doors to change temperature and air flow. If the coolant level is fine, then I typically take part of the dash apart to see if the actuators are trying to function. Most of the time, you can see them trying to function as this will indicate that the motor is failing. If you plan on having this repaired, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose the heater issue and make the appropriate repairs.

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