KitchenAid Range Hood LIGHT-F Error: Light Switch Fault
What Does KitchenAid Range Hood Error LIGHT-F Mean? LIGHT-F describes a condition where a KitchenAid range hood lighting control is not responding normally. The button may be unresponsive, the lights stay on permanently, or they cycle and dim without user input. This is a touch-panel or control-board fault rather than an LED failure — the […]
Quick Assessment
Answer to continue safely
Is it safe to keep using?
Yes. Fan ventilation is not affected by a light switch fault. The hood continues to work normally for cooking ventilation. Only the lighting behavior is abnormal.
Can I reset the code?
Yes. A thorough cleaning and drying of the touch panel may clear moisture-caused faults. A hardware failure will not clear and requires service.
When to stop immediately?
Stop if you notice: Lights get unusually hot or cabinet warm above the LED area, Burning smell from the control panel area.
Symptoms You May Notice
Light button unresponsive but other controls work
The fan speed buttons work normally but pressing the light button produces no illumination change. The hood is otherwise functional.
Lights stay on and cannot be turned off
Once illuminated, the lights remain on regardless of button presses. Cutting power at the breaker is the only way to turn them off.
Lights cycle or dim without user input
The lighting changes brightness or cycles on/off without any button press, indicating the control board is acting on phantom signals or the button is shorted.
Possible Causes
Light touchpad button failed
The membrane switch for the light button has failed — either stuck in the pressed position, unresponsive, or electrically shorted. This is the most common cause of unusual light behavior.
Requires ProfessionalControl board light relay stuck
The relay on the control board that switches the LED driver has welded contacts, keeping the lights on permanently. Less common but produces the same visual symptom.
Requires ProfessionalTouch panel moisture contamination
Water or cleaning solution under the touch panel bezel can short the light button circuit and produce erratic behavior. Drying out often resolves the issue.
DIY PossibleSafe Checks You Can Do
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1
Clean the touch panel and let dry
Disconnect power. Wipe the touch panel with a lightly damp cloth and dry thoroughly. Do not spray cleaner directly on the controls. Wait thirty minutes with power off to allow any trapped moisture to evaporate.
Steam from cooking can condense on the touch panel and cause random button activation — regular cleaning helps prevent this.
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2
Use the breaker to control lights as a temporary workaround
If the lights are stuck on and cleaning does not help, use the breaker to turn them off until service can repair the touchpad. Avoid leaving lights on for extended periods as LED driver components can overheat.
A dedicated range hood breaker is much easier to use as a workaround than fiddling with a failing touch button.
When to Call a Professional
Contact a qualified technician if:
- Touchpad replacement clears the fault
- Light relay on control board tested as stuck-closed
- Erratic behavior persisting after thorough cleaning
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