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Error code reference

Whirlpool Hood Error Code F6

MW relay (Relay 4903) failure

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What the F6 error code actually means

Your Whirlpool hood is showing an F6 error because one of its internal electrical switches has failed and may be stuck in the on position. This means the switch can no longer properly control power to part of the appliance. The unit should not be used until the faulty part is inspected and replaced by a qualified technician.

Diagnostic procedure

The full F6 procedure

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1
First diagnostic step
Unplug microwave oven or disconnect power, then check wiring to Relay 4903 and check if relay contact has welded closed.
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Most common causes of F6

Ranked by how often they cause this code
  1. 1Welded relay contacts on Relay 4903
  2. 2Overloaded relay circuit
  3. 3Loose or corroded wiring connections to Relay 4903
  4. 4Failed relay coil

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Questions people ask about F6

What does F6 mean on a Whirlpool hood?
F6 indicates a failure of the MW relay, designated Relay 4903, in the hood's electrical system. The most serious form of this fault is a welded relay contact, where the relay switch is stuck in the closed position and cannot interrupt the circuit. This prevents the relay from functioning correctly and requires inspection and likely replacement of the component. Power should be disconnected before any diagnostic work is performed.
Is it safe to use my Whirlpool hood when F6 is displayed?
No, it is not safe to continue using the hood while the F6 code is active. A welded relay contact means part of the circuit may be permanently energized, which can cause overheating or further electrical damage. The appliance should be powered off and left unused until the relay is inspected and repaired.
Will resetting the Whirlpool hood clear the F6 error code?
Simply resetting the hood by cycling power will not resolve the F6 error if Relay 4903 has physically failed or has welded contacts. The fault will return because the underlying hardware problem still exists. A lasting repair requires inspection and replacement of the faulty relay, not just a power reset.
Can I fix the F6 error myself on a Whirlpool hood?
Diagnosing and repairing the F6 error requires working with internal electrical components, so only those comfortable with appliance repair should attempt it. The first step is to unplug the hood or disconnect power at the breaker before inspecting the wiring to Relay 4903 and checking whether the relay contacts are welded closed. If the relay is confirmed faulty, it will need to be replaced. If you are unsure about any part of this process, a licensed appliance technician should handle the repair.
How much does it cost to repair the F6 error on a Whirlpool hood?
Repair costs will vary depending on whether the fault is limited to Relay 4903 or whether additional wiring or components were damaged. Parts costs for a relay component typically fall in the range of $10 to $50, while professional labor to diagnose and replace the part can add $75 to $200 or more depending on your location and service provider. Getting a diagnostic estimate before authorizing repairs is recommended.

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