the drip tray full light is on but i just emptied it, sensor seems broken.

Diagnosis

The De'Longhi Dinamica Plus ECAM37095TI uses a mechanical float system to detect when the drip tray is full. This consists of a small, lightweight plastic float that rises as water levels increase in the tray. When the float reaches a specific height, it triggers a magnetic reed switch or a physical contact point, signaling the control board to illuminate the "Drip Tray Full" indicator. The most common cause for a persistent light after emptying is "sludge buildup." Over time, a mixture of coffee oils, fine grounds, and mineral deposits creates a sticky residue around the float's guide rail. This residue acts like glue, trapping the float in the "up" position even when the tray is empty. In some cases, a small piece of coffee debris can physically wedge itself between the float and the wall of the tray housing, preventing the sensor from resetting. You can confirm this by removing the tray and observing if the float remains at the top of its track rather than resting at the bottom.

How to Fix It

To reset the sensor and clear the error, follow these precise steps:

1. Power off the machine and unplug it from the wall to avoid any electrical shorts during cleaning.
2. Slide the drip tray and the coffee grounds container (the removable plastic bin) completely out of the machine.
3. Locate the float sensor. On the ECAM37095TI, this is a small, white or translucent plastic cylinder located on the right-hand side of the tray assembly, housed within a small vertical guide channel.
4. Use a damp microfiber cloth and a mild detergent to thoroughly scrub the guide channel. Ensure all brown residue and slime are removed from the walls of the channel.
5. Using your finger or a cotton swab, gently push the float down to the bottom of its track. It should move freely with a slight spring-like resistance. If it feels gritty, use a toothpick to clear any trapped coffee grounds from the bottom of the slot.
6. Dry the entire sensor area completely. Excess water trapped in the sensor housing can sometimes cause a false reading.
7. Reinsert the grounds container and slide the drip tray back into the machine.
8. Power the machine on. The light should now be extinguished.

If That Didn't Work

• Check for Tray Misalignment: Ensure the drip tray is pushed fully into the machine. If the tray is slightly skewed or not seated flush against the back panel, the sensor may not engage correctly with the internal detection mechanism, leaving the light on.
• Clean the Reed Switch Area: If the float is moving freely but the light persists, there may be coffee buildup on the internal contact point inside the machine chassis. Use a vacuum with a narrow nozzle attachment to suck out any loose grounds from the cavity where the tray sits.
• Inspect for Float Damage: Examine the white plastic float for any cracks. If the float has a hairline fracture, it can fill with water, lose its buoyancy, and sink or get stuck in a neutral position, which the machine often interprets as a "full" state. If cracked, the tray assembly must be replaced.
• Hard Reset: Unplug the machine for at least 10 minutes. This clears the temporary memory of the control board and forces it to re-poll the sensors upon startup.

Heads Up

• Never use abrasive scouring pads or steel wool on the float sensor channel, as scratches in the plastic provide new anchor points for coffee sludge to accumulate.
• Avoid using harsh chemical descalers directly on the plastic float, as this can warp the material and cause the sensor to jam permanently.
• To prevent this issue, rinse the drip tray with warm soapy water every 3-4 days, rather than just emptying the liquid; this prevents the "sludge" from hardening.
• Always ensure the grounds container is seated perfectly flat in the tray; if it is tilted, it can push the tray against the sensor wall and trigger a false alert.