sounds like you need to replace the heater core
It's a Dodge thats why.
passenger side floor board
The Battery is located in the Floor board between the driver and passenger seats, you will have to remove the rubber floor to access it. Special tools you may need are on the passenger side in the floor, where the jack is.
Water is leaking on passenger side floor board when heat is on
It is on the bottom of the passenger side of the dash. Look up from the passenger floor board and you will see it. It is held in by three bolts.
this could be from the heater core. When the heater core goes out it leaks....right into the passenger side floor board If it is water, not coolant, the problem could be a plugged air conditioner drain. Easily accesible from under the hood.
Roll up the windows!
Crack in the heater core
If a Dodge Ram Van is not getting any heat, the first sign of it being the fault of the heater core would be a very wet passenger side floor board. The heater core is located near the foot well on the passenger side.
Passenger side floor board. Open passenger door, look up and foward towards firewall. There are 2 screws holding it in the blower box. It has a 1X3 5 pin connector.
On the passenger side floor board under your carpeting and a metal plate where you rest your feet On the passenger side floor board under your carpeting and a metal plate where you rest your feet
Heater core leaking?