Posts Tagged: Heat Only Works When Driving

Heat Only Works When Driving: The Common Causes

Why Your Car Heater Only Works When Driving — And How to Fix It Quick Read Summary:  The most common reason you get cold air at idle but plenty of heat while driving is that your coolant level is low. When the coolant level drops, the heater core doesn’t get enough flow at low engine speeds, so the air turns cold when you stop. Check the coolant reservoir first and top it off to see if the heat returns. If the coolant level is fine, the problem may be a … Read More