heater

i think my heaters out on my vr4. i drove around for an hour and all that came out was cold air. how much does a heater core cost, used or new? is it easy to replace the heater core? any advice?

I think its ok, because i live in oklahoma and the cold weather got down to 20 degrees and my heater did the samething for like 1/2 hour but after i guess the car got warmer it dident do it anymore. I just left my car on for like 20min and let it warm up.
Do you park your car outside or in the grage? if outside try to parked in the garage, were its warmer and try it agin and see if still gives you could air.

check ur coolant make sure its full a heatercore is not that much but its a 10 hour job good luck