GE Microwave Error F1
⚡ Quick Answer: The GE microwave F1 error code signals a malfunction in the temperature sensor circuit, preventing the appliance from accurately monitoring internal t... ✅ DIY Fixable
What Does Error F1 Mean?
The GE microwave F1 error code signals a malfunction in the temperature sensor circuit, preventing the appliance from accurately monitoring internal temperature. This may lead to unresponsive buttons or the microwave failing to start a cook cycle. The error often persists even after power resets, indicating a potential open circuit in the thermal sensor or issues with the main control board.
Common Symptoms:
- Microwave immediately shows F1 on display and may refuse to start a cook cycle.
- Code persists after simple power interruptions or resets.
Possible Causes
- Open circuit in temperature sensor (thermal sensor) (high)
- Faulty main control board misdetecting sensor status (medium)
- Wiring issue between thermal sensor and control board (medium)
How to Fix Error F1
DIY Fix Perform basic reset and check display behavior
- Unplug microwave from power for at least 60 seconds.
- Plug the microwave back in and observe if F1 reappears.
Technician Only Test and replace temperature sensor (thermal sensor)
- Unplug microwave and discharge high‑voltage components.
- Access internal cavity and locate temperature/thermal sensor.
- Test sensor resistance with a multimeter to verify continuity and expected resistance values.
- Replace temperature sensor if open or outside specification.
- Reassemble and test microwave for error recurrence.
Parts needed: Temperature/Thermal Sensor
Technician Only Inspect wiring harness and control board
- With power off and unit safe, inspect wiring harness from thermal sensor to main control board for damage or loose connectors.
- Repair or replace damaged wiring as needed.
- If wiring and sensor are good but F1 persists, test main control board and replace if confirmed faulty.
Parts needed: Wiring harness, Main control board
- If you are not comfortable safely accessing internal microwave components (due to high voltage risks)
- If initial checks (reset, wiring inspection) do not resolve F1 and further diagnosis is required
Next step
Choose the next step for F1
Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.
Most relevant component to inspect
Temperature Sensor
Monitors the internal temperature to ensure correct operation and prevent overheating.
- Typical part-only price
- $15 - $35
- DIY difficulty
- Easy
- Estimated time
- 15-30 mins
Where can I find the model number?
Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.
Verify the complete model and part number on the retailer's compatibility page before ordering.
Other parts options
Check related components first; use model search as a fallback.
Wiring Harness
Connects controls, sensors, motors, and other electrical components inside the appliance.
Main Control Board
The central brain of the appliance that controls all components, cycles, and timings.
Model-compatible Microwave parts
Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.
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Technical Specifications
| wattage | 1000W |
|---|---|
| component | Control Board |
| resistance | N/A |
| part_number | WB27X10928 |
| voltage_rating | 120V AC |
Common Questions
What does F1 error mean on GE microwave?
F1 indicates a temperature sensor malfunction, causing unresponsive controls and preventing cooking.
Can I fix GE microwave F1 error myself?
Yes, you can try resetting the microwave by unplugging it for 60 seconds and observing if the error persists.
How much does it cost to fix F1 error?
Repair costs for the F1 error typically range from $20 to $80 for parts (temperature sensor only).
When should I call a technician for F1?
Call a technician if you can't safely access internal components or if initial troubleshooting doesn't resolve the error.
Sources & References
- GE Microwave Error Code Definitions (official)
Data last verified: 2026-07-26
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