A full BES920 tank can still trigger Fill Tank when it is not pushed fully home and its latch is not closed. Treat the display or symptom as a clue, not as proof that a pump, grinder or board must be replaced. Change one user-accessible condition at a time and let every shutdown finish. The tank coupling or level detection is not engaged even though water is visibly present. This message with a full tank concerns seating first; a genuinely empty tank or absent group flow follows a different path. Remove the tank, check the seating area for loose debris, refill with fresh water, push it in fully and close the latch. Restart once and confirm Fill Tank clears without pressing or wedging the reservoir during operation.
Models covered
Safety first
- Keep water out of the bean hopper, grinder and electrical openings. Never reach inside a running grinder or force a hot, pressurised component.
What the symptom may indicate
Checks in the right order
- Confirm the pattern
The tank coupling or level detection is not engaged even though water is visibly present.
- Prepare safely
Finish the automatic shutdown, unplug the machine and let hot surfaces cool. Remove only the tank, tray, brew group or cleaning accessory named by the manufacturer.
- Apply the official check
Remove the tank, check the seating area for loose debris, refill with fresh water, push it in fully and close the latch.
- Retest once
Restart once and confirm Fill Tank clears without pressing or wedging the reservoir during operation.
Stop and get qualified help when
- Stop for a harsh grinder noise, repeated electrical error, uncontrolled leak, burning smell or a symptom that returns after the one official retest.
Next step
Repair, replace a part, or arrange a diagnosis?
Use the checks and stop conditions above to choose a cautious next step. A symptom alone never proves that the appliance has failed.
Resolve it without buying anything
Complete the 4 user-accessible checks in order. If normal operation returns and no warning sign remains, no replacement is indicated.
Replace only the confirmed part
If the checks isolate a worn or blocked component, match its complete reference to the exact appliance model before ordering.
This guide does not identify a replacement part. Do not order a generic component from the symptom alone.
Arrange a diagnosis before replacing the appliance
Stop at any warning sign listed above. A qualified diagnosis should confirm that repair is unsafe, unavailable or uneconomical before an appliance replacement is considered.
Sources used
- Sage — Sage's official material documents “Sage Dual Boiler BES920 says Fill Tank when full” and the user checks retained here.
Last checked: 30 August 2026