Forced hot air unit unit appears to work fine other than blowing cool air buderus furnace

I looked up the word buderus,, in american dictionary and it says there is no such word.
So tell us more about your furnace, is it gas or electric? What have you done to check it out so you could say it appears to work fine. Does it just look good ? Or can you see what is working and what's not working,, if its blowing cold air,what ever is supposed to be making the heat isn`t working,, let us know more info and we would be glad to try and help you

I've never actually seen a Buderus forced air unit, seen their boilers though.