How to Descale a DeLonghi 22.110 Fully Automatic Coffee Machine

If your office’s DeLonghi 22.110 espresso machine starts acting up or brewing weaker shots, scale buildup from hard water could be the culprit. Many renters or buyers of this popular Italian import wonder how to properly descale it—especially when the warning light turns red.

The DeLonghi 22.110 signals it needs descaling when its red maintenance light begins flashing, typically after 200 to 1200 brewed cups (adjustable in settings). Descaling clears mineral buildup that affects taste and function.

When Does the DeLonghi 22.110 Need Descaling?

The DeLonghi 22.110 uses a red blinking light on the main control panel to indicate descaling is needed. This light is located just beneath the large knob used to adjust coffee dose. The alert is triggered based on the internal cup counter, which can be set between 200 and 1200 brewed cups before prompting descaling. Even if the light hasn’t come on, regular descaling is good practice depending on water hardness.

Why Descaling Matters for Your Coffee Machine

Regular descaling prevents mineral scale from building up inside the machine’s water pathways. In areas with hard water—such as Beijing—this buildup can clog pipes, degrade heating elements, and alter espresso flavor by interfering with water’s role in extraction. Since over 90% of espresso is water, clean water pathways help maintain flavor clarity and machine reliability.

What You’ll Need to Descale the DeLonghi 22.110

• Official DeLonghi 22.110 descaling solution
• Fresh water
• A cup (to catch water from the steam wand)
• Patience—descaling takes several cycles

Step-by-Step: How to Descale the DeLonghi 22.110

1. Prepare the Water Tank

Start by removing the water tank and adding the entire bottle of DeLonghi descaling solution. Then fill the tank to roughly one-third full with fresh water. Do not overfill—it extends descaling time unnecessarily. Secure the tank back in the machine.

2. Position the Steam Wand and Catch Cup

Manually swing the steam wand all the way to the left. Place a cup directly beneath it to catch expelled water—don’t rely on the machine’s wastewater tray, as the flow can splash.

3. Start the Descaling Process

Press and hold the red descaling indicator light (yes, the actual blinking button) for several seconds to begin the descaling mode. A brief press will start the standard rinse cycle, which won’t remove scale and leaves the alert light on.

4. Watch for the Steam Light

Once descaling mode activates, the yellow steam indicator light will begin blinking. At this point, turn the steam knob counterclockwise. Hot water will start flowing from the steam wand into your cup.

5. Let the Machine Cycle

After some water flows, the steam wand will stop. The descaling button light will now stay solid, not blink. Wait patiently—do not press any buttons. The machine is cycling internally. Eventually, the “water low” light will illuminate, signaling it’s time to refill.

6. Refill and Resume

Remove the water tank, discard any leftover solution or water, and rinse the tank thoroughly. Refill it again to about one-third capacity with fresh water, then reinsert the tank. The steam wand will begin dispensing water again, emptying most of the tank’s contents this time.

7. Final Steps

When the “add water” light comes on again, turn the steam knob clockwise to close it. Fill the water tank to full, reinsert it, and you’re done. The DeLonghi 22.110 is fully descaled and ready for use.

Frequently Asked Questions

How often should I descale my DeLonghi 22.110?

The DeLonghi 22.110 will prompt you with a red blinking light after a set number of brew cycles—defaulting between 200 and 1200 cups, adjustable in the machine’s settings. For optimal performance, especially with hard water, descale when prompted or every 2–3 months if used frequently.

What does the red blinking light mean?

The red light located under the coffee dose knob indicates the machine requires descaling. It flashes based on the internal counter of brewed cups, which is user-set between 200 and 1200 cycles. The light is a maintenance alert, not an immediate error.

Can I use another descaling solution?

The article specifies using the official DeLonghi 22.110 descaling liquid. While alternatives exist, using the manufacturer’s product ensures compatibility and effectiveness for this specific model.

Do I have to descale if the light hasn’t come on?

No, the machine will operate without the descaling alert. However, depending on your water hardness, mineral deposits can still build up. Regular descaling helps maintain performance and flavor even if the light hasn’t triggered yet.

Why use only a third of the tank’s capacity?

Filling the water tank to about one-third full reduces the overall descaling time. A full tank would require more cycles and prolong the process without additional benefit.

What if I accidentally hit the wrong button?

Pressing the red descaling light briefly triggers a rinse cycle, not descaling. If that happens, the descaling alert will remain. To start descaling, you must hold the button down until the steam indicator blinks.

Recommended FrontStreet Beans for Office Espresso

For your DeLonghi 22.110, try FrontStreet Coffee’s Classic Blend for balanced crema and chocolate notes, or the Specialty Blend for brighter fruit and floral hints. Both roast profiles suit office espresso machines and highlight clean extraction—key once your machine is descaled. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.