Range Hoods Low Severity
F4 Appliance Error Code

Maytag Range Hoods F4 Error: Temp sensor / auto-sense

What Does Maytag Range Hood Error Code F4 Mean? F4 on Maytag MHY range hoods with auto-sense ventilation signals the temperature sensor that triggers automatic fan-speed increases is not responding correctly. When auto-sense is selected, the sensor under the hood reads cooktop heat and ramps fan speed accordingly. F4 means this feature is impaired, though […]

Quick Assessment

Answer to continue safely

Is it safe to keep using?

Yes. Manual fan speeds continue to work. Only the auto-sense feature is impaired.

Can I reset the code?

Yes. Power cycle may clear transient faults. Hardware faults return.

When to stop immediately?

Stop if you notice: F4 persists after sensor cleaning, Auto-sense completely non-functional.

Symptoms You May Notice

Auto-sense feature not responding to heat

Fan does not automatically ramp up when cooking heat increases.

F4 on display with auto mode selected

Selecting Auto produces F4 instead of automatic operation.

Manual fan speeds still work normally

Direct speed buttons function; only auto-sense is impaired.

Manual fan speeds still work

Selecting fan speed manually operates the hood normally — only the automatic heat-sensing mode fails.

Possible Causes

1

Failed temperature sensor

Sensor under the hood that reads cooktop heat has failed.

Requires Professional
2

Sensor contaminated by grease

Heavy grease coating prevents accurate temperature reading.

DIY Possible
3

Disconnected sensor harness

Wiring loose after recent service or installation.

Requires Professional

Safe Checks You Can Do

These checks are safe for homeowners. No disassembly required. Do not remove panels or access internal components.
  1. 1

    Clean sensor area

    Turn off the hood breaker. Wipe the underside of the Maytag MHY hood with a degreaser. The temperature sensor is a small probe near the center bottom on models with auto-sense.

    Heavy grease coating frequently causes F4 on auto-sense hoods.

  2. 2

    Use manual speeds temporarily

    While awaiting service, use the manual speed buttons instead of Auto mode.

    No loss of function — just requires user attention.

When to Call a Professional

Contact a qualified technician if:

  • F4 persists after thorough cleaning
  • Sensor reads infinite ohms on multimeter
  • Harness visibly damaged

Need Professional Help?

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