Skip to main content
Error code reference
GE Microwave Error Code Lower Thermal Sensor OPEN
The lower thermal sensor circuit is open, indicating a broken or disconnected lower thermistor (red and white wires).
SourceGE Advantium 120V (ATC) - Full Service Manualp. 69
Diagnostic procedure
The full Lower Thermal Sensor OPEN procedure
Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.
MyPros+ · DiagnosticsStep 1 preview
1
First diagnostic step
Check resistance between red and white wires of the thermistor; should be 256K ohms at room temperature.
SourceGE Advantium 120V (ATC) - Full Service Manualp. 69
More steps, wiring diagram references, and verified part numbers
Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.
Unlock Lower Thermal Sensor OPEN procedure $9.95
Or subscribe: $29/month for all codes plus Max diagnostics, with 70 Max messages a day. Plus applicable tax.
Where this code is documented
8 manuals in the MyPros+ library document this code for GE microwave.
Models covered by the manuals that document this code
75,000+ service documents · 20,000+ error codes · 100+ brands
Get Started$29/month · Cancel anytime · Or $9.95 3-day pass · Plus applicable tax