No, two separate systems.
A leaking heater core will cause the engine to overheat because the coolant is leaking out.
the heater core, heater core hoses or heater control valve is leaking
the heater core is leaking
windshield leaking heater core or heater core hoses.
No. You have either a leaking heater core, or a leak at the windshield.
If it is leaking inside the car, the heater core has failed.If it is leaking inside the car, the heater core has failed.
Only if the coolant is leaking from the heater core, but you will see this.
roof or heater core leaking roof or heater core leaking
Leaking heater core.Leaking heater core.
No there is no freon in the heater core just antifreeze. The heater core is nothing more than a tiny radiator.
You may smell coolant when the ac is running but a leak in the heater core won't cause the ac not to work.
The heater core is leaking. Replacing the heater core is your best bet.