Technivorm Moccamaster Corrosion in Boiler or Metal Components

Rust-colored or metallic-tasting water from coffee maker

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Internal corrosion of copper boiler, Deterioration of metal fittings, Contaminated water supply, Use of aggressive cleaners damaging metal surfaces

Safety: Do not consume coffee with metallic taste or discoloration.

Inspect water source: Check if tap water itself is discolored. If so, use filtered or bottled water.
Descale gently: Use a manufacturer-approved descaler rather than harsh acids that can attack metal.
Internal inspection (advanced): If corrosion is suspected inside the copper boiler or fittings, the boiler assembly should be replaced. Do not attempt to sand or grind internal surfaces.

Hard 4/5

Copper Boiler Assembly

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