OK, granted this a minor annoyance in an otherwise wonderful and silent car. I tend to leave my HVAC on low fan (1-2 bars). For the past 5 years, the fan has chirped like a cricket for the few few minutes and then went silent. Now it's tending to go on longer and longer. Yes it's the fan, because turning the HVAC off, stops the sound. Anyone know what's involved in replacing this fan and or what it costs? Is it buried deep in the dash or is it easily accessible?