The heater core is usually your last resort. So now start from the end to the beginning, core, thermostat, flush, hose, fluids. Follow the trail and your bound to find your answer.
Dodges are good for blowing fuses. If that is not it, the fan switch might need replaced.
I have a 2002 Jeep Grand Cherokee Laredo that was doing the same thing. The problem was a faulty ac/heater switch. You put the switch on ac, compresser engages, lines get cold and frosty, but only hot air is coming out of the vents, because the switch has changed back to heater even though it shows ac. The cure is to have the center panel which contains the ac/heater switch, fan speed switch and temperature control replaced.
electric heater
In most cases when a vehicle heater that has been working properly in the past begins to blow cold air the cooling system is low on coolant. It could also mean that your heater core is clogged. A good coolant system flush might take care of this, otherwise you may have to have it replaced.
you could have an air pocket in your core. the speakers check fuse.
heater core plugged or air locked check to see if hoses going to heater core are hot
it's leaking coolant. Needs to be replaced.
No one knows if:The heater is NOT blowing - or blowing on high speed only, or... The heater IS blowing, but the air is NOT hotEither way, the "Related Questions" below will get you started
Sounds like the heater core may be plugged up or the heater damper door is broken. See "Related Questions" below for more
What do you mean by "has no heat"? No air blowing out, blowing out cold air when heater is on, blowing nothing at all? Heater not turning on? What specifically is happening?
needs heater core replaced wost likely be hind the glove box
If your heater is a heat pump , then yes.
Low coolant and a clogged heater core are possibilities.
faulty control valve on heater or air in the lines
You may need to replace your Thermostat or your Heater Core.
Could be a bad thermostat or heater core
If your heater core wasn't leaking at the time your radiator was replaced , then ( no ) That would be two separate jobs