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Error code reference

KitchenAid Oven Error Code F5E3

Loss of 120 VAC across L1 to Ground or Q19 circuit error.

KitchenAid codesKitchenAid oven codes

Loss of 120 VAC across L1 to Ground or Q19 circuit error.

First step from the service manual

Check ground or replace control.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What F5E3 means on a KitchenAid oven

The F5E3 error code on a KitchenAid oven indicates a loss of 120 VAC measured across L1 to ground, or a fault within the Q19 transistor circuit on the electronic control board. This code points to a problem in the power delivery or switching circuitry that the control board monitors to confirm proper voltage levels are present. The oven's control continuously checks that the incoming line voltage on L1 is properly referenced to ground. When this reference is absent or falls outside expected parameters, the board flags F5E3 and typically disables oven operation to prevent unsafe conditions.

The Q19 designation refers to a specific transistor component on the control board used in a switching or sensing circuit. A failure in this transistor, whether caused by a short, open circuit, or heat damage, can trigger the same F5E3 code even if the incoming power supply itself is intact. This means the fault may originate either externally in the home wiring and grounding path, or internally within the control board's own circuitry.

Common external causes include a missing or high-resistance ground connection at the oven's terminal block or wall outlet, a wiring fault in the L1 supply leg, or a tripped breaker affecting only one leg of the 240 VAC supply. Internally, a damaged Q19 transistor or related components on the control board will produce the same code. The first diagnostic step is to verify the ground connection and incoming voltage before assuming the control board itself has failed.

Source: manufacturer service documentation.

Common causes of F5E3

  1. 01

    Missing or faulty ground connection

    Wiring / connection

    A loose, corroded, or disconnected ground wire at the terminal block, wall outlet, or junction box can cause the control to lose its voltage reference to ground. Inspect all ground connections for continuity and secure attachment.

  2. 02

    Failed Q19 transistor on control board

    Part replacement

    The Q19 transistor on the electronic control board may have failed due to heat stress, power surge, or age. If the ground checks out properly, the control board itself is likely the source of the fault.

  3. 03

    Loss of L1 voltage leg

    Wiring / connection

    A tripped breaker, blown fuse, or wiring fault affecting only the L1 leg of the 240 VAC supply can result in the control detecting missing voltage across L1 to ground. Check the circuit breaker and measure L1 voltage at the terminal block.

  4. 04

    Loose or damaged wiring at terminal block

    Wiring / connection

    Wires connected to the oven's terminal block can loosen or sustain heat damage over time, interrupting the L1 or ground circuit. Visually inspect and check for secure connections at all terminal block lugs.

  5. 05

    Damaged control board (beyond Q19)

    Part replacement

    If the Q19 circuit has sustained broader damage, such as a burned trace or failed supporting components, the entire control board will need replacement. This is the last step after ruling out external wiring issues.

See the test procedure for each cause

Frequently asked questions about F5E3

What does F5E3 mean on a KitchenAid oven?
F5E3 indicates a loss of 120 VAC across the L1 line to ground, or a fault in the Q19 transistor circuit on the control board. The oven's control board monitors this voltage reference continuously, and when it detects a problem, it triggers this code and may disable oven operation. The fault can originate in the home wiring, the oven's ground connection, or internally on the control board itself.
Can I fix the F5E3 error on my KitchenAid oven myself?
Some causes of F5E3 are accessible to a knowledgeable DIYer, such as inspecting and tightening the ground connection at the terminal block or checking the circuit breaker for a tripped leg. However, diagnosing and replacing the control board, or working inside a live electrical panel, should be handled by a qualified technician. Always disconnect power to the oven before inspecting any wiring or components.
Is it safe to use my KitchenAid oven when F5E3 is displayed?
No. The F5E3 code indicates a potential issue with the ground circuit or internal control board circuitry, both of which are safety-critical. Using the oven with a compromised ground or faulty power circuit creates a risk of electrical shock or fire. The oven should remain off until the fault is diagnosed and corrected.
Will resetting my KitchenAid oven clear the F5E3 error code?
A reset by cutting power to the oven for several minutes may temporarily clear the code, but it will return if the underlying fault is still present. If the ground connection is faulty or the Q19 circuit on the control board has failed, the error will reappear once the oven runs its diagnostic cycle again. A reset alone is not a repair.
How much does it cost to repair a KitchenAid oven showing F5E3?
If the fix is as simple as tightening a ground connection or resetting a breaker, the cost may be minimal. If the electronic control board needs replacement, parts and labor typically range from $200 to $500 or more depending on the specific model and labor rates in your area. Getting a diagnostic service call first, usually $75 to $150, can help confirm whether the board or a wiring issue is responsible before committing to parts.

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