lower frquency buzz noise... the fan never turns, the house attic unit fan runs but the house never cools. What could be the problem? (I'n not sure about the model number for the 5.5 year old exterior unit.)
Heating & Cooling - Bryant - 463AAC005BA Air Conditioner
Answers & Comments
Sounds like your condenser fan motor (outside unit) is 'froze up.' Bearings are probably bad. I would suggest having a Service Tech check it out.
Not much you can do yourself - maybe look for an obvious loose wire or something (if you do this be sure power is all off).
It's possible a 'fan capacitor,' (a small grey/silver thingamyjig about the size of an oversized cigerette lighter) is bad - (it will have a wire from the fan motor going to it) but - "not likely."
If it (fan cap) is bad - sometimes they will 'bulge' which is a dead giveaway that it is bad. In which case you could take it down to an AC parts house and get a replacement. If you do this - be sure 'all power is off,' and you mark the wires when your remove the old fan cap - and buy an exact replacement - so you can hook it back up correctly.
Again, the most likely problem is that the fan motor itself is bad - and needs replacing which will run about $200 if a Service Tech does it.
Note: it's possible that you have a 'blown fuse' or a 'tripped disconnect,' on your outside unit - so - I would make sure that your 'fuses/breakers' are all good too.
hope this helps