So you can guess how terrible this is, especially in a Minnesota winter.

When the car was bought, there was no heat. Which wasn't a problem in the summer.
So, my question is for you all, what is most likely to go out in the Spirit as far as heating components go? Heater core? Blower switch? I'm not exactly sure what it could be as I'v never worked with heating elements within a vehicle.
Also, just as a deper explanation, anyone want to tell me how the heating system works? Is it run electrically (heater coil), or via the radiator?
Anyway, thanks for your help, whomever responds.

 

dont think i have ever seen an electrically run heater core... first.. you have to tell us.. do you feel air when you turn it on.. this will tell us if its just the fan or not.. turn it on and turn it on hi... if you feel air.. cold or hot... the fan works.. if not.. check your fuses.. and the blower motor resistor.. that would most likely be the culprit.. if all that works... make sure the radiator is full of ANTIFREEZE mixture with water.. also .. make sure the heater coil isnt bypassed.. it could be plugged..

 

The blower itself works just fine. Air runs well at all vents. I wasn't completely sure on how the heater ran, so, thanks.
Anyway, the radiator is full of antifreeze. So, the possible broken elements are either there's a blockage or the resistor is gone. So, it shouldn't be too bad of a fix. I think I might be looking at a 1-2 hour job of taking it out and putting it in.
Apparently before the car was bought, the heat just went out, so I don't think it's a blockage in the system, but the resistor itself or the heater core.
As a side note, I replaced the thermostat with a 180* failsafe for the person who owned the car before my ex, so I know that has nothing to do with it. But, if after replacing the resistor or heater core and it feels lukewarm, the thermostat will have to be replaced as it is most likely stuck in the open position.

 

I had a similar problem with my Dakota...turned out to be a plugged heater core. I took a female garden hoserepair couplerand connected it to the inlet heater core hose, disconnected the other hose at the core and flusheda ton of crap out of the heater core - after that it blew hot air again.