Nespresso EN 125 s leaking

If your Nespresso D150 coffee maker is leaking water from the bottom as soon as you attach the water tank, there might be a few possible causes for this issue. Here are some steps you can take to troubleshoot and address the problem:
1. **Check O-Ring Seal:** Even if the O-ring inside the water tank appears fine, it's worth inspecting it closely for any signs of wear, damage, or misalignment. If the O-ring is not creating a proper seal, it can lead to leaks.
2. **Clean and Lubricate O-Ring:** Sometimes, debris or residue can accumulate on the O-ring, preventing it from forming a tight seal. Clean the O-ring and the area where it sits in the water tank thoroughly. Applying a small amount of food-grade lubricant can help ensure a proper seal.
3. **Check for Cracks:** Examine the water tank for any cracks or damage that could be causing water to leak out. Even a small crack can lead to significant leakage.
4. **Check Water Tank Connections:** Ensure that the water tank is properly aligned and securely attached to the machine. If it's not properly seated, it can cause leaks.
5. **Inspect Machine Gaskets:** There might be gaskets or seals on the machine itself that interact with the water tank. Inspect these gaskets for wear, damage, or misalignment.
6. **Water Level Sensor:** Some coffee makers have a water level sensor that detects the water level in the tank. If the sensor is damaged or not functioning correctly, it might cause leakage. Contact Nespresso or a professional technician for assistance with sensor-related issues.
7. **Pressure Relief Valve:** Coffee makers often have pressure relief valves to regulate pressure within the system. If this valve is not functioning properly, it can cause leaks. This might require professional assessment and repair.
8. **Contact Customer Support:** If the issue persists despite troubleshooting, consider reaching out to Nespresso's customer support or a professional technician who specializes in coffee maker repairs. They can provide more specific guidance based on your machine's model and issue.
Remember that working with electrical appliances and water can be potentially hazardous. If you're unsure about any aspect of troubleshooting or repair, it's best to seek professional assistance to avoid causing further damage or compromising safety.

It is possible that your Nespresso machine is experiencing a malfunction and may need to be serviced. The leak and hissing sound could be signs of a clogged brewing head, a damaged water tank or pump, or a malfunctioning valve. To prevent further damage, it is best to stop using the machine and contact Nespresso customer service for assistance. They can guide you through the troubleshooting process and provide you with options for repair or replacement if necessary.

1 do you have a water tank in place?
2 does the water tank leak on its own?
if all is well check the broken seal from under the tank or pipe.

Press/Hold the large cup button until u reach the desired measure of your coffee... Release it when u think it is enough for your large cup..

I opened mine when this did this - it also happened to my second Magimix Nespresso Manual machine. A short pipe carrying pressurized water had burst. I called Nespresso . parts were not available and they offered me a new half-price machine. We are talking a 4 inch piece of plastic tubing here. Shame on you Nespresso for encouraging me to throw what is otherwise a fine machine....

Sounds like a gasket or seal gone or a split pipe.

If it's still under warranty - take it back for free service or replacement.

If you do have to attempt DIY, then a clear silicone sealant may save you the price of expensive gaskets.
Be very careful when taking apart - take notes or photos as it will help put it back together !
I usually put related sub-assemblies together with their screws in separate pots.

Use less water....

If you just bought it you should return it immediately and try another.

call the Nespresso Club 0800 442 442
Frog