So I have a 2003 Volkswagon Jetta with about 160,000 miles on it. I’m having trouble with the a/c and heat blowing out strongly or at all. The only way I can get it to work is to have the air on high when I’m driving at higher speeds but then not long after that it goes out and makes an unusual high-pitched ERRRRRRING sound. When it is blowing out the heat and a/c is a good temperature.
What could be the problem? Estimates on how much to fix it? It’s a VW so it’s usually pricey which makes me afraid to take it in but I need heat for winter.