Kuppersbusch
Residual Heat Sensor / Indicator Circuit Fault
Cooktop indicator light for a hot surface stays on even when all zones are cool.
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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
Stuck residual heat sensor, shorted indicator circuit on control board, miswired indicator lamp, sensor NTC out of range
How to Fix / Troubleshooting
Safety first: Confirm that all zones are actually cool before assuming a fault.
- Power reset: Turn off power for a few minutes and restore. If the indicator remains on, proceed.
- Sensor check: Access the underside of the cooktop and locate the residual heat sensors attached to the radiant elements. Test their resistance at room temperature and compare to specifications.
- Wiring inspection: Check for shorted wires between sensors and the indicator circuit.
- Replace sensor or board: Replace the faulty residual heat sensor if out of spec. If sensors are good, the indicator/control board may be defective.
Note: Some models keep the indicator on for an extended time by design; consult the manual for normal behavior.
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Repair Difficulty
Medium
3/5
Required Part
Residual Heat Sensor
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