Sounds like 1: the heater core was never fixed or 2: the coolant system wasn't filled and purged properly. if the car is loosing coolant and overheating i would check the heater core. if its low on coolant or has air in the coolant lines you wont get any heat either.
If your talking about coolant leaking on the passenger floor then it means your heater core is leaking and needs to be replaced.
A damaged heater core will cause coolant or water to leak onto the passenger floorboard.
If it is water you have a plugged condensation drain line that needs to be cleaned out. If it is engine coolant you have a leaky heater core that needs to be replaced.
If you see coolant Inside the vehicle on the passenger side, The Heater Core would be the problem.If the leak is out side and you see a puddle on the ground below the engine from the passenger side, It can be a Water pump, Heater hose, Over flow from the Reservoir tank, or an intake manifold gasket.If the leak is more underneath the vehicle on the passenger side, It might be a Heater Hose and/or Heater Pipe which supplies the rear heater with coolant (if the vehicle is equipped with rear heat) .
yes
Your heater core is leaking. It needs repaired or replaced.
Heater core is probally leaking. Should be located under dash on passenger side.
You probably have a puncture in your heater core.
repair the heater hose.
Check for a sickly sweet smell. The heater core is probably leaking coolant into the floor. The core is not repairable but can be replaced.
Leak in heater core
Your heater core is leaking ( inside heater housing under passenger side dash ) it must be replaced. You can stop the leak temporarily by looping the two hoses together that enter the firewall from the engine until a repair can be made.