Clean and reseat the water tank
Clean the detached tank, rinse away detergent and record the optional softener’s 100 ml post-cleaning water delivery.
Version 2.0.0. Required observations are marked *. Your answers stay in this browser.
1. Match the model and parts
With the machine cool, empty and unplugged, check the underside nameplate for EC685 or EC685 EX:4. Compare the frother and tabbed filter with the linked manual. The support page is on a US domain but its download is English International. Use the manual supplied for your regional appliance; no US voltage or electrical compatibility is inferred.
Region: English International manual 57132C8997_01_0626; regional nameplate must match
Parts: Three buttons, steam dial, removable frother and tabbed perforated filter as pictured in this manual
Not covered: EC680; Dedica Arte EC885; Maestro EC950; Modified steam wand; Different filter design; Regional instructions that differ from this manual.
Choose the versions you can confirm.
Compare versions →2. Prepare
Stop for a damaged cord, burning smell, liquid leaking from the appliance body, all lights flashing while the machine does not work, or a holder that remains hot or pressurized. Disconnect when safe and contact De’Longhi Customer Services. Keep the casing, boiler and internal steam circuit closed.
Consumables and fit
| Item | Specification & fit | Do not substitute |
|---|---|---|
| Fresh clean water | Fill the tank no higher than MAX. EC685 / EC685 EX:4 matching this manual. | Do not operate with an empty tank or with the tank removed.p6 §2 |
| Mild washing-up liquid | Use a little on a damp cloth, then rinse the detached tank thoroughly. Water tank cleaning in §11.5. | Descaler substitution, abrasives or detergent inside the appliance body.p10 §11.5 |
3. Follow your checks
Match the model and preparation to start.
Read all possible routes
Is the appliance undamaged, with delivery stopped and parts cool and unplugged for any hands-on work?
- Yes — Keep hands clear of outlets during the specific powered water or steam steps below.
- No — Stop for a damaged cord, burning smell, liquid leaking from the appliance body, all lights flashing while the machine does not work, or a holder that remains hot or pressurized. Disconnect when safe and contact De’Longhi Customer Services. Keep the casing, boiler and internal steam circuit closed.
- Not sure — Save a preparation record and compare the matching manual before continuing.
Does your EC685 or EC685 EX:4 match English International manual 57132C8997_01_0626, including the three buttons, original frother and tabbed filter?
- Yes — Continue only with the controls and parts pictured in this manual.
- No — Find the manual supplied for your region and component version. This guide cannot confirm a different version.
- Not sure — Save a preparation record and compare the matching manual before continuing.
Is the tank intact and removable by its handle without forcing a damaged valve?
- Yes — Clean the detached tank with the appliance cool and unplugged.
- No — A cracked tank or damaged valve requires the matching part or Customer Services.
- Not sure — Save a preparation record and compare the matching manual before continuing.
Can you identify whether the optional water-softener filter C7 is fitted?
- Yes — Record its presence; it changes the final flushing step.
- No — Compare the tank and C7 with the manual before removing an unidentified part.
- Not sure — Save a preparation record and compare the matching manual before continuing.
4. Follow and record
Complete the checks before recording physical work. Follow steps in order.
Record and remove the optional filter
Lift out the tank with the cool appliance unplugged. Record whether C7 is present, then remove it if fitted.
Look for: You know whether the conditional 100 ml delivery is required after cleaning.
Manual: p6 §1.3; p10 §11.5Clean the tank gently
Use a damp cloth and a little mild washing-up liquid on the detached tank. Rinse the tank thoroughly so no cleaning residue remains.
Look for: The tank is visibly clean and thoroughly rinsed before it returns to the appliance.
Manual: p10 §11.5 step1; §11 cleaning cautionsRinse and return the existing filter
If C7 was present, rinse it under running water and put it back. This is care of an existing matched filter; a new cartridge follows its own supplied fitting instructions.
Look for: The previously fitted filter is back in place, or no filter was fitted.
Manual: p10 §11.5 steps2–3Fill and reseat
Fill with fresh clean water no higher than MAX. Return the tank and press down lightly to open its bottom valves.
Look for: Water is available and the tank sits normally without force.
Manual: p6 §2; p10 §11.5 step3Deliver 100 ml when a filter is fitted
For a tank with C7, reassemble and power on. Place a measuring container under the hot-water dispenser, wait for the coffee-ready lights, open the steam dial to the steam/hot-water symbol and collect 100 ml. Close the dial to ○. Keep hot-water delivery within the manual’s 60-second limit. If no filter is fitted, record that this extra delivery does not apply.
Look for: 100 ml has been collected for the filtered tank; absent flow or an inability to complete it calls for stopping and checking the water supply.
Manual: p10 §11.5 step4; p8 §8Save the cleaning date
Record the date. Plan tank cleaning about monthly and whenever the optional softener is replaced. Inspect the normal seating for any leak before returning to drinks.
Look for: The date and filter-dependent flushing result are both saved.
Manual: p10 §11.5
5. Keep your result
Record what you observed. A completed checklist does not certify that equipment is repaired.
When to check again
About monthly or when the water-softener filter is replaced.
Clean the tank regularly, about once a month, and whenever the optional filter is replaced.
Manufacturer guidance · p10 §11.5Sources & fit
- De’Longhi EC685 / EC685 EX:4 instructions (57132C8997_01_0626)p10 §11.5; p6 §2; p8 §8 · Checked 2026-10-13
- Dedica Style EC685.TB EX:4 support centerEC685.TB EX:4 → English (International) → Instructions for use, 57132C8997_01_0626 · Checked 2026-10-13
Independent, AI-assisted guidance. No physical repair trial is claimed. Manufacturer instructions for your exact version take priority.