GE Microwave F6 Error Code — What It Means
F6 on a GE microwave indicates a shorted temperature probe. GE’s fault-code chart lists this code specifically for when the control detects a short circuit in the temperature-sensing probe circuit, as distinct from an open probe or a probe that is simply unplugged during a temperature-cook function. The code is designed to help service technicians pinpoint the problem quickly.
This fault stops normal operation because the control cannot safely manage temperature-based cooking when it sees a shorted probe signal. The issue almost always lies in the probe itself, its harness, or the connections between the probe and the control board.
Common Causes
- Failed temperature probe with an internal short The probe element itself develops a short circuit inside, causing the control to register F6.
- Damaged or pinched probe wiring Wires in the probe harness that are pinched, cut, or chafed can create a short that triggers the code.
- Corroded or loose probe connector Moisture or dirt at the connector can bridge terminals and mimic a shorted probe.
- Control board sensing circuit fault Less commonly, the input circuit on the electronic control misreads the probe and throws F6 even when the probe tests good.
Step-by-Step Fix
- Turn off power to the microwave at the circuit breaker or by unplugging the unit, wait about one minute, then restore power and check whether the F6 code reappears.
- Inspect the temperature probe harness and connector for any pinched wires, corrosion, loose pins, or visible damage along the entire length from the probe to the control board.
- Disconnect the probe connector at the control board and examine both halves for moisture, debris, or bent terminals that could cause a short.
- Test the temperature probe circuit with a multimeter set to measure resistance, and compare your reading to the specification on your model’s tech sheet or service manual (GE does not publish a universal resistance value for all models).
- Replace the temperature probe if your meter shows a dead short (zero ohms) or if the reading falls outside the model’s published range.
- Inspect and repair any damaged wiring in the probe harness, replacing connectors or splicing wires as needed if you find cuts or exposed conductors.
- Test the control board sensing circuit if the probe and wiring measure correctly but the F6 code persists, and replace the electronic control if the input circuit is faulty.
Parts Often Needed
| Part | Notes |
|---|---|
| GE microwave temperature probe | Amazon | Match the probe to your exact model number, the most common cause of F6. |
| Probe wiring harness or connector | Amazon | Order if you find damaged wiring or corroded terminals in the probe circuit. |
| GE microwave electronic control board | Amazon | Required only if the probe and wiring test good but the code remains. |
When to Call a Pro
GE advises that a trained service technician should diagnose and correct displayed fault codes like F6. If the power reset does not clear the code, or if you are not comfortable working with electrical circuits and using a multimeter to test resistance values, call a qualified appliance repair technician. The technician will have the service manual for your model, the correct probe specifications, and the tools to safely test both the probe circuit and the control board. Professional diagnosis is especially important if you have already replaced the probe and the fault persists, because the problem may lie in the control board’s sensing circuit rather than in the probe itself.