Error code reference
GE Microwave Error Code Upper Thermal Sensor OPEN
The upper thermal sensor circuit is detected as open, indicating a failed or disconnected upper thermistor.
The upper thermal sensor circuit is detected as open, indicating a failed or disconnected upper thermistor.
First step from the service manual
Check upper thermistor (blue and white wires) resistance at Smart Board CN09; should be 100K ohm at room temperature.
The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.
MyPros+ Max
Get the full diagnostic procedure for Upper Thermal Sensor OPEN.
- Step-by-step tests with expected resistance, voltage, and continuity values
- Wiring diagram references and connector pinouts from the OEM service manual
- Verified part numbers when replacement is required
Get the full procedure
$29/month · Cancel anytime · Or $9.95 3-day pass
78,000+ service manuals · 160,000+ error codes · 55+ brands
Get Started$29/month · Cancel anytime · Or $9.95 3-day pass