Can anyone tell me how to fix a heater and about how much it will cost?

ahhh, time for the heater questions.. lol

the process is simple, but time consumeing. your basically taking the dash off your car. all of it. untill you can move it away enough to see the heater core box. Once you have reached that, i believe its 6 or 8 small bolts and you can open it up. Cut the old hoses off from outside ( be sure you have either drained the collant, or pinched off the lines.) once you have those lines off go back inside and pull the old core out. To replace, do the opposite of that.

your best bet is to get a Haynes manual to do this, lots of helpfull hints and what not in those things. Pays for itself in one use like this.

go to a shop to have this done. ive heard anywhere from 600 to 1200 bucks. OR you can do it yourself for about 50, includeing a full flush of the coolant..

and about 3 to 6 hours of your day