If your car is leaking antifreeze and you can’t figure out where it’s coming from, there’s a chance your heater core is blown. Other signs that your heater core might be damaged include a sweet smell in the cabin of your car, steam coming from the vents, or foggy windows.
If you think your heater core might be damaged, the best thing to do is take it to a mechanic and have them take a look. They’ll be able to tell for sure if the heater core is blown and can advise you on the best course of action.