Error Code H-4
Broil heating element not energizing during self-test
Critical
Stop using immediately - risk of damage or safety issue
Also displayed as: H-4
What This Means
Broil heater element failure; Broil heater wire disconnected; Wall Main PCB relay failure; Wall Main PCB failure
What actually causes this:
Heater element burnt out, loose connection, or PCB relay failure
First Thing to Check
Verify broil heater wires are connected to Wall Main PCB terminals T206-T207
Parts Involved
How to Fix
- 1
Check broil heater operation and wire connections (T206, T207 on Wall Main PCB)
- 2
Verify heater wire is connected correctly to PCB terminals
- 3
Measure heater resistance (should be 11-15 ohms at room temp)
- 4
Test relay operation during broil mode
Other Error Codes for NQ70M9770D
Temperature sensor internal to Main PCB is not functioning
Keypad short circuit detected
Temperature sensor reading exceeds safe operating threshold
Door lock mechanism malfunction or misalignment
Meat probe sensor circuit shows abnormally low resistance
Bake heating element not energizing during self-test
Main control board temperature sensor reads excessive heat
Partition configuration changed during active cooking cycle