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lauragonzo 3
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3 years, 1 month ago

Why does my Bialetti Moka express make ear-splitting train-whistle-esque noises when it's brewing espresso?

I have a new, 9 cup stovetop espresso maker and, when I make more than half a pot of espresso, the little valve on the side pops out and makes a horrible whistling noise which continues until it's taken of of the burner.

I'm curious if this was the intention of the manufacturer and/or how to make it stop.

http://www.bialettishop.com/MokaExpressMain.htm
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bbrookin | 3 years ago
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I apologize for how long its taken for your question to be answered.

I don't think it was the intention of the manufacturer for the espresso maker to make an ear-splitting whistle. I've never owned one quite as large as yours (we have a small version in our backpacking supplies and a 6-cup at home), but neither of ours whistle.

I wonder if you have a machine with a faulty pressure valve? The most logical explanation for the whistle on this coffeemaker - where steam and pressure are part of the process - is the escape of the steam pressure. Since you mentioned the valve, that would be my first guess. In that case, I'd take it back to the store for a replacement.

My other thought is the gasket has some teeny leak allowing pressure to escape between the two chambers. I think this is less likely, but the gasket can be replaced to eliminate this possibility.

While doing research for this question, I found no similar problem mentioned (but a lot of happy owners). I recommend taking this machine back to the store for an exchange. This is the least costly option to you and is most likely to fix the problem.

Happy brewing!
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