The display shows “ERR4” and the unit powers on but will not heat or brew.
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
How to Fix / Troubleshooting
Safety first: Unplug the coffee maker and allow it to cool. Do not attempt to operate it while covers are removed.
Basic Checks:
- Confirm the outlet has power by testing it with another appliance.
- Try a different outlet to rule out a faulty receptacle.
Internal Inspection (Advanced DIY):
- Remove the bottom cover to access the heater tube or plate.
- Inspect the wiring for burns, breaks, or loose connectors.
- Examine the main control board for a burnt heater relay or traces.
If the heater element is open (requires a multimeter) or the wiring is damaged, the heater assembly should be replaced. If the board relay is burnt, the control board must be replaced. These repairs are complex and often not cost-effective compared to replacing the coffee maker.
Repair Difficulty
Required Part
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