DeLonghi coffee machine is leaking from below: 7 reasons and how to fix the leak

Have you noticed a puddle under DeLonghi coffee machine and don't know what to do? Leaking from below is one of the most common faults, but it does not always mean a serious breakdown. In half of the cases, the problem can be fixed on your own in 10–20 minutes, without resorting to the help of a service center. The main thing is to correctly diagnose the cause and not aggravate the situation.

In this article we will look at all possible causes of leakage (from banal water overflow to wear of seals), we will give step-by-step repair instructions with photos and videos, and we’ll also tell you when It is necessary to take the equipment to the workshop. Let us separately dwell on the nuances for popular models DeLonghi Magnifica, Dedica, Eletta and others.

We warn you right away: if the water flows continuously (even when the machine is turned off) or has a rusty tint - this is a sign of a critical breakdown. In other cases, follow our instructions.

1. Water overflow: the most common cause of leakage

In 60% of cases the coffee machine DeLonghi flows from below due to water tank overflow or incorrect installation of the drip container. This is not a breakdown, but an operating error. Here's how to recognize it:

• 💧 Water dripping only during work (coffee preparation or heating).
• 🔍 A puddle is forming front under the drip tray, not at the back or sides.
• ☕ The coffee turns out too liquid or weak (this is due to the fact that the water does not have time to pass through the ground coffee).

To fix the problem:

1. Unplug the machine and remove water container. Check if the tank is overfilled (the maximum level is usually marked on the wall).
2. Make sure drip tray installed correctly and not distorted. In models DeLonghi Magnifica S and Eletta it should click when locked.
3. If a lot of liquid has accumulated in the tray, drain it and rinse the container under running water (especially if there are remnants of coffee grounds).

Water level in the tank|Position of the drip tray|Cleanliness of the drainage hole|Integrity of the rubber seal on the tray-->

If after these manipulations the leak continues, the reason lies deeper. Continue to the next point.

2. Clogged drain hole or tube

In every coffee machine DeLonghi yes drainage system, which drains excess water and condensation into the drip tray. If this system becomes clogged, water begins to flow out from the bottom of the housing. Blockage can occur due to:

• ☕ Coffee grounds (unless you clean the machine after each use).
• 🧂 Scale (especially in regions with hard water).
• 🕳️ Dust or debris, which fell into the hole when rearranging the equipment.

How to clean the drain:

1. Unplug the machine and remove drip tray and grate (if any).
2. Under them you will see a small hole (3–5 mm in diameter) - this is drainage. Take toothpick or thin needle and clean it carefully.
3. If the blockage is deep, use syringe with warm water: Insert the needle into the hole and rinse under pressure.
4. To remove scale, pour into the drain citric acid solution (1 tsp per 100 ml of water) and leave for 10 minutes, then rinse.

What to do if the drainage is clogged with scale?

If simple cleaning does not help, you will have to disassemble the machine. In models DeLonghi Dedica and Lattissima the drainage tube is attached to the pump - it needs to be disconnected and washed in a vinegar solution (1

1 with water) for at least 30 minutes. After this, blow the tube with compressed air (for example, a hairdryer in cold blowing mode).

Important! Do not use metal objects (screws, nails) for cleaning - they may damage plastic parts or seals.

3. Wear or displacement of rubber seals

Sealing rubber bands (gaskets) in a coffee machine DeLonghi Over time, they lose elasticity, crack or shift. This causes water to seep past them and flow out from below. This happens especially often in places:

• 🔄 Connections between water tank and housing.
• ☕ Holder (holder) for coffee.
• 🔌 Drain tube attachments.

How to check and replace seals:

1. Inspect all visible rubber bands for cracks, tears or deformation. In models DeLonghi Magnifica The gasket under the holder often wears out.
2. If the elastic is intact but misaligned, carefully adjust it into place (for example, in the grooves of the water tank).
3. To replace, buy original set of seals for your model (part numbers can be found in the instructions or on the DeLonghi website). The average cost is 300–800 rubles.
4. Before installing a new rubber band, lubricate it. food grade silicone spray (for example, WD-40 Specialist Food Grade) - this will extend the service life.

Once a month|Once every 3 months|Only when it leaks|Never cleaned-->

Model DeLonghi	Commonly worn seals	Average service life (years)
Magnifica S	Holder gasket, reservoir rubber	2–3
Dedica EC685	Steam pipe seal	1.5–2
Lattissima One	Cappuccino maker rubber band	2–4
Eletta	Pump gasket, drain pipe	3–5

Critical information: In models DeLonghi PrimaDonna The pump and boiler seals are interconnected. If it leaks from the bottom right, this is a sign of wear on the boiler gasket, and replacing it requires complete disassembly of the machine.

4. Pump or boiler failure

If the coffee machine DeLonghi flows from below continuously (even when turned off) or the water has rusty shade, the problem is most likely in pump or boiler. This is a serious failure and in most cases parts will need to be replaced.

Signs of pump failure:

• 🔊 The machine makes unusual sounds (grinding, buzzing) during operation.
• ☕ Coffee is flowing in a thin stream or it doesn't flow at all.
• 💦 Water flows out pulsating shocks.

Signs of a problem with the boiler:

• 🌡️ Car does not heat water or does it for too long.
• 🔥 It comes from under the body steam.
• 🩸 Water has red or black sediment (a sign of corrosion).

What to do:

1. If the car is under warranty - don't take it apart yourself. Contact an authorized service DeLonghi (list on the official website).
2. For models older than 2 years, you can try flush the pump vinegar solution (1:3 with water), but this is a temporary measure.
3. The cost of replacing a pump is from 3,000 to 6,000 rubles, a boiler is from 5,000 to 12,000 rubles (depending on the model).

5. Crack in the water tank or drain pipe

Plastic parts of the coffee machine DeLonghi Over time they may burst due to mechanical stress or temperature changes. Most often they crack:

• 💧 Water tank (if it was dropped or the lid was overtightened).
• 🔧 Drainage tube (from pump vibration).
• ☕ Drip tray (if it is often removed and inserted with force).

How to detect a crack:

1. Dry all removable parts with a paper towel.
2. Fill the tank with water and wrap it dry cloth. If the napkin gets wet, there is a microcrack.
3. Inspect the drain tube for ruptures or peeling (especially in places of bends).

Solutions:

• 🛒 If the tank or tray is cracked, buy original replacement (price 800–2,500 rubles). Non-original parts may not fit correctly.
• 🔧 A crack in the drainage pipe can be temporarily repaired food grade sealant (for example, Loctite 406), but this is a short-lived solution.

6. Pressure relief valve malfunction

The pressure relief valve is a small part that prevents the boiler from exploding if it overheats. If it gets stuck open, water will constantly dripping from below, even when the machine is turned off. This problem is typical for models with automatic cappuccino maker (DeLonghi Lattissima, Eletta).

Signs of valve failure:

• 💦 Water dripping rhythmically, at intervals of 1–2 seconds.
• 🔥 Car overheats (the case is hot even from the front).
• ☕ Coffee has bitter taste (due to overheating of water).

How to fix:

1. Unplug the machine and let it cool down at least 1 hour.
2. Remove the back cover (in most models it is secured with 2–4 screws).
3. Locate the valve (usually a small metal piece with a spring located near the boiler).
4. Gently press it with a screwdriver - if water flows out, the valve is jammed. Try rinsing it vinegar solution.
5. If washing does not help, a replacement is required (the cost of the part is 500–1,500 rubles).

7. When to contact service: 3 critical cases

Not all breakdowns can be fixed on your own. Bring the coffee machine immediately DeLonghi to the service if:

⚠️ Attention! If your car is leaking oil (not water) is a sign of destruction of the pump seals. Further use will lead to complete failure of the equipment.

• ⚡ The leak is accompanied by sparking or a burning smell (Possible electrical short circuit).
• 🔥 Steam is coming from under the body (risk of boiler explosion).
• 🩸 The water has a black color or a strong chemical smell (destruction of internal coatings).

Average prices for repairs in service centers DeLonghi (Moscow and regions):

Type of failure	Repair cost (₽)	Duration (days)
Pump replacement	3 500–6 000	1–3
Boiler replacement	5 000–12 000	3–5
Electrical wiring repair	2 000–4 500	2–4
Descaling (full)	1 500–3 000	1

Before visiting the service:

1. Take a photo serial number (on the sticker on the back).
2. Write it down model and year of purchase (this will help you select original spare parts).
3. If the car is under warranty, take it receipt or guarantee card.

FAQ: Frequently asked questions about leaks in DeLonghi coffee machines

Can I use the car if it leaks a little?

If the leak is small (a few drops a day) and the water is clean, it’s possible, but not for long. Constant moisture will lead to corrosion of internal parts or short circuit. It is better to eliminate the cause within 1–2 weeks.

How often should you clean your DeLonghi coffee machine to avoid leaks?

Minimum requirements:

• 🧽 After each use: drain the water from the drip tray, rinse the holder.
• 🧂 Once a month: descaling (with special tablets or citric acid).
• 🔧 Once every 3 months: Check the seals and drainage hole.

Why is my new DeLonghi coffee machine leaking?

In 90% of cases this is defective seals or incorrect assembly. Do not try to repair it yourself - contact the store for replacement under warranty. If the car was purchased online, make a video showing the leak - this will speed up the return process.

Can sealant be used to repair cracks?

Yes, but only food grade silicone sealant (for example, Dow Corning 732). Apply it in a thin layer on dried and defatted surface. Do not use superglue or epoxy - they are toxic and can ruin the taste of the coffee.

⚠️ Attention! Sealant is a temporary solution. To be on the safe side, replace the cracked part.

How to check if your car is leaking due to scale?

Look into drip tray: if there is a white or yellow coating, this is scale. Also signs are:

• ☕ Coffee is flowing slower than usual.
• 🔊 Car makes more noise when heated.
• 🌡️ The water does not reach the required temperature.

To remove scale, use special means (for example, DeLonghi EcoDecalk) or citric acid solution (20 g per 1 liter of water).