The heater main point is important to warm the engine coolant and produce warm air in her truck. Indications that you must replace the core include sweet smells from inside, vapor coming out the vents and also coolant leaking top top the floorboard. ~ above a Dodge lamb made between 2002 and also 2006, you need to remove the heating/air air conditioning unit indigenous the van to change the heater core. This will involve removed the dashboard, which may require the help of at the very least one other person.

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Take the van to a legal, licensed air air conditioning technician that deserve to correctly discharge the air conditioning system.


Disconnect the truck"s negative battery cable and also then drainpipe the engine coolant at the radiator"s drain plug, letting that pour into a big container.


Disconnect the heater hoses from the firewall on the right side, sliding away the water tap clamps. Cover the firewall openings with tape or rubber plugs.


Unbolt and also detach the air conditioning accumulator and also its bracket using your wrench. Disconnect the air conditioning lines native the evaporator.


Unscrew and remove every trim panels ~ above the instrument panel and the tool cluster. Lower the steering column and also disconnect all electric connectors. Detach the hood release and also parking brake handles, then eliminate the tool panel"s fasteners with your wrench. Lift and remove the instrument panel.


Disconnect the electric connectors for the powertrain regulate module, situated on the ideal rear edge of the firewall. Eliminate the module"s mounting bolts with your wrench, then eliminate the module.


Unscrew and remove the two mounting nuts because that the heater/AC unit in ~ the engine compartment using your wrench, climate disconnect the unit"s electric connectors and also vacuum hoses from inside the truck. Eliminate the nuts and also bolt from the interior and remove the heating/AC unit.


Remove the heater core"s two retaining screws in ~ the peak of that triangle-shaped evaporator tubes, then press the retaining tabs at the bottoms of the tube and also lift the main point out of its housing.


Slide the new heater core right into the housing, making sure its foam seals room all in place, and also apply the retaining screws wherein the evaporator pipe come together.


Install the heating/air air conditioning unit within the interior of the truck making use of its nuts and bolts, hoses and electrical connectors from inside the passenger and also engine compartments.


Reinstall the tool panel with its fasteners and also reconnect all of its switches, the tool cluster and also its trim panels.

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Reconnect the powertrain control module and the air air conditioning accumulator through its refrigerant lines come the evaporator. Reconnect the heater hoses to your fittings in the firewall through their clamps.