Our bathroom exhaust fan is located on our second floor bathroom. It's the original installed in 1986. Suddenly, it started to make an unbearably loud noise upon operation. So loud that the sound made a downstairs kitchen sink faucet fixture shake.
An additional unsettling thing about this fan is that this horrible noise starts up spontaneously. We are not in this bathroom and the sound starts.
We think we've discovered a way to curb the horror once it starts: Strongly depress a light switch (which has nothing to do with this fan) --and the noise stops.
Please help! This is scaring me!