What does it mean if you smell coffee brewing and there is no brewing?

If you smell coffee brewing but there's no coffee maker running, it could mean a few things:

* Phantom smell: Your brain can sometimes play tricks on you, especially when you're expecting a certain scent. You might be really craving coffee and your brain is filling in the blanks.

* Residual scent: Coffee is a strong aroma, and it can linger in the air, on surfaces, and in your clothes even after the coffee has finished brewing. If you recently brewed coffee, the smell might still be lingering.

* A neighbor's coffee: Could your neighbor be making coffee? If you live in an apartment or a close-knit community, the smell might be drifting over from their place.

* Something else is burning: Though unlikely, it's possible that another appliance or something in your home is emitting a scent that resembles coffee. Check for any burning smells or unusual activity.

To figure out the real reason, try the following:

* Check your coffee maker: Make sure it's not accidentally turned on or that there isn't a coffee pot left in the brewing cycle.

* Sniff around: Try to pinpoint where the smell is strongest. This might give you a clue as to its source.

* Ask your neighbors: If you suspect it might be coming from their place, ask them if they're making coffee.

If you can't figure out the reason and the smell persists, it might be best to investigate further or call a professional to ensure there isn't a safety issue.