They usaually fog up the inside of the windshield when defrost is used, soak the pass side floor with coolant and smell of anti freeze when operating heater in any mode.
No, a clogged heater core will not make it overheat. A leaking heater core will.
your heater core is leaking
usually caused by a leaking heater core.
the heater core, heater core hoses or heater control valve is leaking
heater core leaks
The heater core has failed and is leaking engine coolant.
Heater core leaking?
its leaking under the car around where the dash is
your heater core is bad
Heater core could be leaking
YES. Good possibility if it is leaking at the passenger side
most likely cause is your heater core leaking