Capresso
Steam / Pressure Venting Through Restriction
Capresso coffee maker makes a high-pitched whistling or hissing noise during brewing.
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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
Partially clogged outlet or shower screen, Scale buildup in thermoblock, Loose or damaged steam vent gasket, Overheating due to low water flow
How to Fix / Troubleshooting
Safety first: Keep hands away from steam vents. Unplug and allow to cool before cleaning.
Steps:
- Clean shower screen and outlet: Remove and clean the brew head screen and any visible outlet holes to remove coffee residue.
- Descale: Run a full descaling cycle to clear restrictions in the thermoblock and tubing.
- Check water level and flow: Ensure the reservoir is full and that water flows freely during brewing. Restricted flow can cause steam buildup.
- Inspect vent seals (advanced): With the housing removed (unplugged), inspect any steam vent gaskets for damage or misalignment and replace if necessary.
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Repair Difficulty
Medium
3/5
Required Part
Brew Head Gasket
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