I just had my blower motor replaced this weekend for the same issue. It is more of a common issue and if you complain about it and demonstrate it to the dealer they should replace the core.
The chirping at the lowest two notches was annoying as heck for me. It was hard to reproduce it in the dealer garage because my exhaust was loud, but once I took them outside they could hear it. It's even more noticeable if you're driving and you don't really hear your exhaust.
|