The heater core will not cause the A/C to not blow cold. If your A/C is working properly with the correct amount of refrigerant, then you may have a temperature blend door not working and staying on heat mode.
Can a bad heater core cause a car to overheat?
Yes, a leaking heater core can cause a loss of coolant and subsequent engine overheating. Although not as common, it’s also possible for a heater core to become obstructed enough to restrict coolant flow and cause overheating. Does a bad heater core affect air conditioning?
Where is the heater core located in a car?
Often times the heater core is buried under the dashboard, and replacing it, is a major job. The air conditioning system in your car is comprised of a compressor, condenser, expansion valve and evaporator.
What happens if the heater core is low on coolant?
A low coolant level (caused by a leaking heater core) can lead to overheating and possible engine damage. What Causes a Bad Heater Core? For instance, if the coolant is not changed at the interval suggested by the vehicle manufacturer, it will eventually break down and become corrosive.
Is the heater core the same as the radiator?
Like your car’s radiator, the heater core is a heat exchanger. But while the radiator transfers heat from the hot coolant into the atmosphere, the heater core transfers heat to the cabin. You’ll also notice that the heater core, with its tanks and fins, looks just like a mini radiator.