Heater/AC only works on #4 and make the car run rough
Not sure if I am saying this correctly. I have a 2010 Ford Escape. Only
67,000 miles. I have owned it for only 6 months. I noticed that when I turn
on my A/C or defrost/heater it only works on #4. It does blow cold/hot like it
is suppose to but when it runs the car seems to run loud and rough. Of
course it's not under warranty and I'm poor ;) so I will have to wait to take it
to the garage. Any idea what this may be? More importantly, if I wait to get
it fixed will it cause other issues that will need to be fixed? I know nothing
about cars so please remember that when responding. lol. Thank you!