What Er37 Means
Er37 means the control board's own self-check found a mismatch between the readback signal — confirming which key, zone, or relay actually fired — and what the board intended to activate, so it can't verify it switched on the right function.
Common Causes of Er37
- Relay or zone-select circuitry on the control board has failed
- A firmware fault causing the board to misread its own internal signal
- A damaged control board
🔧 One Safe Check You Can Try
Cycle power at the breaker for two minutes before assuming a hardware fault — that rules out a temporary glitch first.
⚠ Why You Shouldn't Go Further Than That
- Since this is an internal, board-level self-check fault, guessing at a component to swap without proper diagnostics is a common and costly mistake.
- Safely testing this circuit means the cooktop has to be completely de-energized first.
- Replace the board when the real issue was just a passing firmware glitch and you've wasted both the part and the labor.
- Getting to the control board under the glass typically forfeits the remaining warranty.