You remove heater core in doge neon by smashing the windows then taking off the doors so you can get th the heater core then you get a crowbar and rip it out (if this destroys your Dodge neon then your car isn't a real dodge neon).
how long does it take to install a heater core in a 2000 dodge neon
Haynes repair manual, Dodge Neon 2000 thru 2003. Book #30036
under the dash, behind the glove compartment
Heater Core is the likely culprit
In the middle of the heater box under the dashIn the middle of the heater box under the dash
how to remove a door lock cylinder on 2000 dodge neon
A dodge neon does not have a heater valve. The inside temp is adjusted with an airflow control door inside the dash.
There is no valve, it is probably clogged up.
No, it was not stock.
Radiator, fan, water pump, hoses, heater core, thermostat, engine block, radiator cap,...
you may not have the heater water hoses plugged in