What Empty Trays Means
Empty Trays on a Bosch fully automatic coffee machine means the dregs drawer or the drip tray needs emptying, or that the tray contacts are dirty. The repair instruction explains the mechanism: two electrical contacts sit above the drip tray, and when water rises to touch them the resistance between them drops and the message appears. It also documents the common frustration, a message that stays on after the trays have been emptied.
Common Causes of Empty Trays
- Drip tray or dregs drawer genuinely full
- Damp coffee residue bridging the tray contacts
- Trays refitted before the contact area was dry
🔧 One Safe Check You Can Try
Pull both trays out, empty them and then clean the area around the contacts carefully, drying it before refitting. Bosch names residual water or damp coffee grounds bridging the contacts as the reason the message persists after emptying.
⚠ Why You Shouldn't Go Further Than That
- The contacts are a measuring circuit, and scrubbing them hard enough to scratch changes what they read afterwards.
- Bosch's own figures show the message appearing after roughly eight to fourteen brews depending on strength, so a message that comes far sooner points at contamination rather than a full tray.
- On a built-in machine the tray area sits behind a cabinet front, and forcing a tray past a misaligned panel breaks the runner.
- Anything beyond cleaning the tray area means opening the appliance, which is a technician task on a cabinet-mounted machine.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.