It could be the coolant level is low or a faulty thermostat.
it is a heater. heat. it blows heat. warm air
How to replace the inside Spectra Heater Core on a 2000 dodge durango??
pull the dash
No, it was not stock.
you may not have the heater water hoses plugged in
A dodge neon does not have a heater valve. The inside temp is adjusted with an airflow control door inside the dash.
There is a fuse under the hood for the blower motor.
There isn't a water control valve.
The Dodge Sprinter did not come out until 2002. The heater is an add on option that is installed in a freeze plug on the passenger side of the block.
how long does it take to install a heater core in a 2000 dodge neon
Usually on the fire wall, passenger side.
Heater Core is the likely culprit