中文
含义
F2 表示烤箱腔体温度超过了安全上限阈值（通常为 315°C / 600°F 以上），温度控制系统检测到失控升温。烤箱正常工作时温度由温度传感器反馈至控制板，控制板通过继电器通断加热元件维持设定温度。当控制板持续检测到温度异常升高且不受控时，判定为过温故障并切断加热电源，显示 F2 以保护设备和使用者安全。
常见原因
- 烤箱温度传感器（热敏电阻）参数漂移，向控制板反馈的温度读数低于实际腔体温度，导致控制板持续通电加热。
- 加热元件控制继电器触点粘连，即使控制板断开信号也无法切断加热回路，元件持续加热。
- 主控制板上的温度检测电路（如 ADC 输入通道）损坏，无法正确读取传感器信号。
- 烤箱门密封条破损或门铰链松动，导致热量持续散失，传感器区域测得的温度偏低，控制板过度补偿。
- 温度传感器线束端子氧化或接触不良，引入接触电阻导致分压读数偏差。
自助排查
- 立即在配电箱处断开烤箱断路器，不要尝试直接打开高温烤箱门。
- 等待烤箱自然冷却至室温后，检查门封条是否完整、有无撕裂或变形。关闭烤箱门，用手电筒从外侧照射门缝检查是否漏光。
- 用万用表测量温度传感器阻值。室温（约 25°C）下正常阻值约为 1080–1090 Ω。若阻值明显偏高或偏低，更换传感器。
- 断开传感器插头，用电子清洁剂（如 CRC）清洁线束端子，重新插紧后通电测试。
- 若传感器阻值正常且线束接触良好但故障依旧，故障点可能在控制板继电器或检测电路，需联系 GE 售后服务中心携带替换控制板进行诊断。
English
Meaning
F2 indicates that the oven cavity temperature has exceeded the safety upper-limit threshold (typically above 315°C / 600°F) and the temperature control system has detected runaway heating. During normal operation, the temperature sensor feeds back to the control board, which cycles the heating elements via relays to maintain the set temperature. When the control board continuously detects abnormally high and uncontrolled temperature rise, it declares an over-temperature fault, cuts heating power, and displays F2 to protect the appliance and user.
Common Causes
- The oven temperature sensor (thermistor) has drifted in calibration, reporting a temperature reading lower than actual cavity temperature, causing the control board to keep the heating elements energized.
- The heating element control relay contacts have welded shut — even when the control board removes the drive signal, the heating circuit remains closed and the element continues heating.
- The temperature sensing circuit on the main control board (e.g., ADC input channel) is damaged and cannot correctly read the sensor signal.
- A torn or deformed oven door gasket, or loose door hinges, allows continuous heat loss; the sensor zone reads lower than actual, causing the control board to over-compensate with excessive heating.
- Oxidation or poor contact at the temperature sensor harness terminals introduces contact resistance that skews the voltage-divider reading.
Self-Check Steps
- Immediately switch off the oven’s circuit breaker at the electrical panel. Do not attempt to open a hot oven door.
- After the oven has naturally cooled to room temperature, inspect the door gasket for integrity — check for tears or deformation. Close the door and shine a flashlight along the door seam from the outside to check for light leaks.
- Measure the temperature sensor resistance with a multimeter. At room temperature (approximately 25°C), the normal value is approximately 1080–1090 Ω. If the reading is significantly higher or lower, replace the sensor.
- Disconnect the sensor plug, clean the harness terminals with electronic contact cleaner (e.g., CRC), reconnect firmly, and test with power restored.
- If the sensor resistance is normal and connections are solid but the fault persists, the issue likely lies in the control board relay or sensing circuit. Contact GE authorized service to bring a replacement control board for diagnosis.