Sometimes it works and sometimes it doesnt. I get hot air but the fan does not go on. Vent, heat or defroster all the same?????????? HELP!!!! Winter is here and I am gonna need to be warm.

when you said that some times it works you mean that some times it blows and other times it doesn't blow air

if the fan dose not com on you should check the fuse or maybe the switch is bad

Yes, some times it blows and sometiimes it does not blow. The heat works it just does not blow air out.