If the heater is blowing cold air and the car is overheating, it is likely that the problem is related to the engine cooling system as well. The following are some issues that may be causing the heater to blow cold air: Low coolant levels. A plugged/clogged heater core.
What is the sign of blown head gasket?
Common symptoms of a blown head gasket include the following: External leaks of coolant from under the exhaust gasket. Overheating under the hood. Smoke blowing from the exhaust with a white-ish tint.
Why is my car AC hot?
A car A/C blowing hot air is often the result of a refrigerant leak. Refrigerant is a liquid that circulates through your car’s A/C system, expanding and contracting as it removes heat and humidity from the cabin. None of the other A/C components will function correctly without proper refrigerant levels.
Can the radiator affect the AC?
If the engine is running hot or overheating, it can have a noticeable negative affect on the air conditioning system. Some cars have two electric cooling fans, one for the air conditioning condenser and the other for the radiator. … Usually at idle on a hot day with the AC on both fans will be on.