No idea, I'm afraid. Does the noise bother you? Do you want them to stop making it? If that's the case, then go upstairs while the noise is happening and ask them nicely to please stop making it. Or only do it earlier in the day, or whatever solution will work for you. "I don't know what you are doing, but that noise I mentioned last week? It's happening now. Could you please figure out what is causing it and stop it? Thank you." Bear in mind that in some apartment buildings, noise travels strangely. What seems to be directly overhead might actually be on one side, or upstairs and over one unit, something like that. But if you go up while the noise is happening, you will be able to hear if it is coming from that unit or not. Or you could just live with it. Once I had upstairs neighbors who apparently dropped a bowling ball on their living room floor every night about 10 pm. Big thud of something falling, followed by a rolling noise. I never did figure out what it was, but it wasn't annoying enough to bother with trying to get it stopped.

ravencajun, I'll give that a try when I shut down for the night. I'm willing to try anything. Daylily and zep, I'm thinking it's also the death wail of the monitor. It's only a little over 2 years old but I'm thinking it's time is about up. Don't think I'll be buying another Westinghouse..... thanks for the input.

Just found this while searching for/fixing mine. I turned the washer off and wiggled the connectors around the motor. It started working after that. I found that the capacitor that starts the motor was buzzing and the motor was getting hot. It seems like the connectors on the underside of the motor were a bit loose from 20+ years of use. Might give it a try.....

The blower will usually continue to run for a minute after the condenser shuts down. The purpose of this is to push out any remaining cool air in the duct work. Some humming or buzzing is normal, but it is loud then I suggest having it inspected before the one year anniversary.