How does water flow through a heater core?
How does water flow through a heater core? Hot radiator fluid goes into the core, the heater fan blows through it, heat is transferred to the cooler air, and heat is transferred into the cabin. The input is radiator fluid directly from the engine and output from the core goes directly back into the engine. It is moved through via the water pump on the engine. Why does the flow of the heater core matter? All it does is use the hot water to make hot air. I am pretty sure flow direction doesnt matter for the heater core. All...