I was called to a home to inspect a unit that was having issues. The client stated that the unit was running fine, but there was a noticeable vibration in the neighboring bathroom. They mentioned that they had not noticed this issue before. I advised them to wait until the unit breaks down or the noise becomes unbearable before replacing anything. The client informed me that they were planning to put the house on the market soon and asked me to keep that in mind. I assured them that I would not replace anything until it was necessary.