Coolent leaks from pasenger side of engine.
The heater core is leaking coolant.
it's leaking coolant. Needs to be replaced.
Is it not hot? Not blowing? Leaking coolant? Need more info to help you.
More than likely your heater core is leaking. The only fix is to replace it.
Coolant leaking from the heater core.
If it is leaking coolant. And you changed the thermostat. I would then move to this section. Flush the radiator and the heater core. This can be done at a certified shop with a reliable mechanic.
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
Heater core / hose leaking.
If your talking about coolant leaking on the passenger floor then it means your heater core is leaking and needs to be replaced.
The heater core is leaking coolant.
Low coolant and a clogged heater core are possibilities.