Oster
Metallic Contamination / Corrosion
Brewed coffee has a metallic or rusty taste.
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Safety Warning
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.
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Possible Causes
Corrosion inside aluminum heating tube, Heavy mineral deposits flaking off, Contaminated water supply, Deteriorated internal metal fittings
How to Fix / Troubleshooting
Descale thoroughly:
- Run a full descaling cycle with a 1:1 vinegar-water solution.
- Repeat if heavy scale is visible in the carafe after brewing.
Inspect for corrosion (advanced):
- Remove the bottom cover and visually inspect the aluminum heating tube and metal fittings for corrosion or pitting.
Water source:
- Try brewing with filtered or bottled water to rule out your tap water as the source.
If metallic taste continues and corrosion is visible, replace the heating tube assembly or consider replacing the coffee maker.
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Repair Difficulty
Medium
3/5
Required Part
Aluminum Heating Tube Assembly
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