How To Diagnose & Fix A Car With No Heat!

My car's heater is broken, how do I fix it? When a car isn't producing any cabin heat, there are many different parts of the car that could be causing this to happen. This video looks at diagnosing a broken heater. We'll talk about engine coolant, heater cores, water pumps, HVAC controls, HVAC fans, thermostats, radiators, and all the ins & outs and best practices when looking to understand why and how your heat doesn't work in your car.