Hey im new to the site, i figured maybe i kould get answers here before spending alot of money.. my whole a/c and heating system... i know my a/c needs a new compressor and condenser because of metal in the lines... but my heater for some reason has never wroked either... the funny part is even tho none of the cooling or heating system works my defroster works.. basically it seems like in the summer time the heater works and in the winter time the a.c works... how hard is the process to switch out heater cores and anything additional info i need to know? im thinking thats what it is but its not leaking just no heat.

thanks,

Nate