We have separate air units for our houses' upper and lower levels. And just our luck, given that heat rises, the unit that powers the upstairs has gone out! It's currently 95 degrees upstairs and awful! Just trying to get an idea of what we might be looking at and more importantly the cost of it: When you turn the thermostat to Auto and Cool the blower unit upstairs kicks on but blows very little un-cool air... If you walk outside to the Carrier unit and wait a few minutes you can hear it make a buzzing noise like it's trying to kick on, but then it stops and is silent again. The fan on the unit is not kicking on at all. Hoping it's just the fan. Any suggestions out there??