A leak that appears specifically during brewing often points to a problem that becomes apparent once the water circuit is under pressure. Possible causes include worn brewing seals, a leaking hose or connection, an incorrectly seated brew unit, a restricted coffee path or a valve allowing pressurised water to escape. Dry the machine first and observe whether the leak begins during grinding, pre-infusion or actual coffee dispensing.

Some water entering the drip tray is normal, particularly as the machine releases pressure after brewing. However, if the amount suddenly increases while the volume reaching the cup decreases, brewing water may be escaping before it reaches the coffee outlets. Worn brew-unit seals, internal valve problems or leakage around the brewing mechanism can cause this behaviour.

Yes. Seals around the brewing system need to contain water while the machine is extracting coffee under pressure. As seals wear, harden or become damaged, water can escape around the brewing chamber instead of following the intended coffee path. You may also notice excess water in the drip tray, unusually wet coffee grounds or reduced coffee volume in the cup.

Potentially. A restriction in the brewing or dispensing path can interfere with normal coffee flow and increase pressure upstream of the blockage. Clean accessible coffee outlets and the removable brewing components as appropriate. If coffee is dispensing unusually slowly as well as the machine leaking, a restriction is particularly worth investigating.

If the water tank and drip tray remain dry but water appears underneath the machine during extraction, an internal pressurised connection may be leaking. Possible sources include hoses, connectors, seals, valves or the brewing assembly itself. Because the leak occurs internally and only under operating pressure, it may not be visible when the machine is switched off.

No. First rule out simple external causes such as an incorrectly fitted water tank or overflowing drip tray. If water is clearly escaping from inside the machine whenever it brews, stop using it until the source has been identified. Continued operation can worsen the leak and potentially allow water to reach electrical components.