Does anyone know the TSB number for this problem, if there is one? My car exhibits this issue (buzzing from the compressor after using it but car is off, key out, sitting in garage) , but I want to find out if it's really a problem. Dealer says it can be fixed with a re-flash to the HVAC system, 1/2 hour labor, $60. Is it worth it? Does it have any ill effects to leave it alone? Other than a weird buzz causing others to tell you your car is buzzing?