F4 Minor Moderate DIY

GE Microwave F4 — Open Humidity Sensor

GE Microwave · Error code F4

What F4 Means

F4 means the humidity (sensor-cook) sensor read open. Sensor-cook functions are affected.

Symptoms

  • Sensor-cook fails
  • F4 on the display

Common Causes

1
Disconnected or failed humidity sensor

The genius/humidity sensor is open.

2
Sensor wiring fault

A broken connection to the sensor.

How to Fix It

  1. Unplug for a minute to reset.
  2. If F4 returns, check the humidity sensor connector and replace the sensor if open.

Parts You May Need

If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.

Common replacement GE Microwave Humidity Sensor View on Amazon→

More GE Microwave Codes

DOOR DOOR — Door not fully closed / open too long F0 F0 — Communication / no key entry fault F1 F1 — Open Thermal Sensor (Overheating) F10 F10 — Shorted Touch Screen F11 F11 — Shorted temperature probe F2 F2 — Shorted Thermal Sensor

All GE codes → All microwave codes →

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.