Dualit Brew Pressure / Flow Calibration Issue

Coffee is weak and watery even when using the same coffee and settings.

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.

Possible Causes

Worn pump producing low pressure, Overpressure valve stuck open, Excessive grind coarseness or incorrect capsule type, Blocked or worn filter basket

How to Fix / Troubleshooting

Safety first: Unplug the machine before internal inspection.

User checks:

Check coffee preparation: Ensure you are using the correct grind (fine espresso) and tamping properly, or the correct Dualit-compatible capsules.
Clean filter basket: For ground coffee models, soak the filter basket in descaler or hot soapy water and brush all holes clear.
Descale: Run a descaling cycle to restore proper flow characteristics.

Advanced:

Inspect OPV: Check the overpressure valve for scale or debris that may hold it open. Clean or replace as needed.
Evaluate pump: If flow is high but pressure is low (thin coffee, fast shot), the pump may be worn and require replacement.

Repair Difficulty

Medium 3/5

Required Part

Overpressure Valve

Check Price on Amazon

We may earn a commission from links on this page.