Whirlpool Hood Error Code F4E4

F4E4 means the control board has detected a humidity sensor failure. The humidity sensor monitors steam and moisture from the cooktop to control automatic fan speed. When the sensor signal is missing or out of range, the board triggers F4E4 and automatic moisture-based fan control will not function correctly.

The hood will likely still operate in manual mode, meaning you can turn the fan on and off yourself and use the lights normally. However, any automatic fan speed adjustment based on humidity detection will not work while F4E4 is active. You can continue using the hood manually while you arrange the repair, but leaving a sensor fault unresolved long-term means the hood is not protecting your kitchen as designed.

When you enter Diagnostics mode by pressing CANCEL, CANCEL, START and then press COOK, a functioning humidity sensor should display the value 8891 on the control panel. Any other reading or no reading at all confirms the sensor has failed and needs to be replaced. This step rules out a false fault trigger before you purchase parts.

Start by entering Diagnostics mode by pressing CANCEL, CANCEL, START, then press COOK to display the humidity sensor reading. If the display does not show 8891, the humidity sensor needs to be replaced. Before replacing the sensor, inspect the wiring harness connector at the sensor and control board for loose connections or visible damage, as a reseated connector may resolve the fault without replacing any parts.

A replacement humidity sensor for a Whirlpool hood typically costs between $20 and $60 for the part. If the fix is only a loose connector, there is no parts cost at all. If you hire a technician, expect to add $80 to $150 in labor depending on your location. Replacing the humidity sensor is a moderately accessible DIY repair if you are comfortable disconnecting power and removing the hood's interior panel to access the component.