Originally Posted By: theguyonthecouch
Originally Posted By: JTapia
Just some observations:
*Listening to the noise on the link, it sounds very much like a bad bearing or something hitting the fan blade.
**It also kinda sounds like a chattering contactor.
***The breaker the OP said was turned off was labeled "heat". This tells me that he turned off the AHU inside which has the LV Xformer which in turn would shut down the outside unit also.
****the better test would be as Steelman noted, turn off the disconnect to the outside unit while leaving the inside AHU running. This disconnect should be located next to the outside unit. This way the contactor will stay engaged while the unit stops due to lack of power. If the noise remains, it's the contactor. if it stops it's something with the units moving parts, ie; fan, compressor or combination.


Okay, this time, I killed the outside unit at the outside disconnect and took a video while heat was ON at the thermostat. Is that a normal sound? Its a little louder in the video. You can download the new video here: SOUND


Is that the noise that you have been hearing that is concerning to you when the system is running? From what I can tell from this video the noise sounds as if its a contactor buzzing. If the noise I hear is the same noise that you recorded, if that makes sense.

The fool tells me his reasons; the wise man persuades me with my own.