ERR4
GE Appliances
Control Board Power Supply Fault
Display shows “ERR4” and the unit will not power on fully or respond to buttons.
Advertisements
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.
Advertisements
Possible Causes
Failed low-voltage power supply on control board, Shorted component on PCB, Surge damage from outlet, Loose neutral or line connection inside unit
How to Fix / Troubleshooting
Safety first: Unplug the coffee maker. Internal power supply components can store charge; avoid touching capacitors directly.
- 1. Verify external power: Test the wall outlet with another appliance. Avoid using extension cords or power strips.
- 2. Inspect power cord: Check the GE power cord for cuts, kinks, or burn marks. Replace the cord set if damaged.
- 3. Open base to inspect wiring: Remove the bottom cover and inspect the line and neutral connections from the cord to the control board. Tighten any loose spade connectors or screws.
- 4. Look for board damage: Examine the control board for burnt spots, bulging capacitors, or cracked solder joints. If visible damage is present, the board should be replaced rather than repaired in the field.
- 5. Replace control board: If wiring is intact and ERR4 persists, replace the main control board with the correct GE part number for your model.
Advertisements
Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements