Thanks for the response, I will be in touch with my mechanic to talk about addressing this issue. Is it generally a cheap and easy fix (crosses fingers)? Hopefully nothing is wrong with my head gasket. The temperature didn't enter the red so I'm hoping it's OK.

Hi, I recently purchased a used 2000 Volvo S40 and at about 12 hours into 13 hour drive to Virginia from Michigan, the car started to overheat when stuck in traffic. I turned the air on hot and the engine temperature went down to normal. From what I can hear, it sounds like the fans are working. The...