Sub-Zero
Stuck Surface Temperature Sensor / Switch
Electric cooktop surface hot indicator light stays on even when all elements 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
Failed surface hot indicator switch on element, Shorted wiring to indicator circuit, Faulty control board input
How to Fix / Troubleshooting
Safety first: Disconnect power before accessing the cooktop internals.
Steps:
- Allow full cool-down: Ensure the cooktop has been off for several hours and is at room temperature.
- Identify indicator circuit: Remove the glass top to access the elements. Locate the surface hot switch or sensor associated with the indicator light.
- Test switch: With a multimeter, test the surface hot switch for continuity at room temperature. It should be open. If it remains closed, replace the switch or the element assembly if integrated.
- Inspect wiring: Check for shorts between the indicator circuit and line voltage. Repair any damaged insulation.
Note: Some models use electronic sensing; if all sensors test good, the main control may be misreading and require replacement.
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Repair Difficulty
Medium
3/5
Required Part
Surface Hot Indicator Switch
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