What should I do?
During the winter my heater would make a whistling sound
when started, but once warm, the whistling goes away. I
figured it was cold and it was warming up. Walked outside
today and now my heater doesn't work. I don't want to
spend money to find out from a ford tech because they
won't give me a loaner car because they are booked. I
would rather try to fix it myself.