Er9
Royal Gourmet
Control Board Temperature Processing Error
Display shows Er9 and grill cannot maintain set temperature; temperature swings widely or reading disappears.
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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
Failed analog-to-digital converter on control board, Intermittent RTD connection at board, Corrupted firmware on Royal Gourmet controller, Electrical noise from nearby devices
How to Fix / Troubleshooting
Safety first: Disconnect power before removing the control panel.
Steps to attempt correction:
- Check RTD connection: Confirm the RTD probe connector is fully seated on the control board and that the wires are not loose or frayed.
- Inspect control board: Look for burnt components, bulging capacitors, or corrosion on the main control PCB.
- Power reset: Leave the grill unplugged for several minutes to fully discharge the board, then reconnect and test. This can clear minor logic faults.
- Reduce interference: Avoid running heavy inductive loads (large motors, welders) on the same circuit while using the grill.
- Replace control board: If Er9 persists and the RTD is known good, replace the Royal Gourmet main control board with the correct model-specific part.
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Repair Difficulty
Hard
4/5
Required Part
Main Control Board
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