E03
Wolf Gourmet
Flow Meter / Water Flow Detection Error
Display shows E03 and brewing stops shortly after starting, often with little or no water flow.
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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
Clogged inlet or internal tubing, Scale buildup in flow meter, Faulty flow meter sensor, Air lock in water line from reservoir to pump
How to Fix / Troubleshooting
Safety first: Unplug the coffee maker and let it cool before handling.
- Check reservoir and filter: Remove and reseat the water reservoir. If your Wolf Gourmet model uses an internal water filter cartridge, remove it temporarily and try brewing without it to rule out a blocked filter.
- Run a cleaning cycle: Fill the reservoir with a descaling solution (per Wolf Gourmet instructions) and run a cleaning/descale cycle. This can clear scale from the flow meter and tubing.
- Clear air lock: With the reservoir full, remove and reseat it a few times to help purge trapped air. Start a brew cycle and listen for the pump; if it runs but no water flows, stop the cycle and repeat.
- Inspect for kinks: If accessible without disassembly, visually inspect the reservoir outlet and any visible silicone hoses for kinks or pinches.
- If E03 persists: The internal flow meter or its sensor wiring may be defective. Replacement requires opening the unit and disconnecting water lines, which should be done by a professional technician to avoid leaks and electrical hazards.
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Repair Difficulty
Hard
4/5
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