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Error code reference

Thermador Oven Error Code F19

Miscellaneous power board error.

Thermador codesThermador oven codes

Miscellaneous power board error.

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What F19 means on a Thermador oven

The F19 error code on a Thermador oven indicates a miscellaneous power board fault. The power board, sometimes referred to as the main control board or power supply board, is responsible for regulating and distributing electrical power to the oven's components, including the heating elements, cooling fans, control panel, and safety relays. When the power board detects an internal fault condition that does not fall under a more specific error category, it generates the F19 code as a general fault signal.

Common triggers for this error include voltage irregularities from the supply circuit, internal component failures on the board itself such as failed capacitors or relay contacts, and wiring harness issues that disrupt proper signal or power flow between the board and other components. Heat stress over time can degrade solder joints and board-mounted components, leading to intermittent or persistent faults. A power surge or brownout event can also cause immediate board damage that triggers this code.

Because F19 is classified as a miscellaneous power board error, diagnosis can be more involved than errors tied to a single component. Technicians should start by inspecting the power supply voltage reaching the board, checking for visible burn marks or damaged components on the board, and examining all wiring harness connections for corrosion, loose pins, or heat damage. If the board shows physical damage or fails to operate correctly after a thorough inspection of wiring and supply voltage, replacement of the power board is typically required.

Source: manufacturer service documentation.

Common causes of F19

  1. 01

    Power board internal failure

    Part replacement

    The power board itself may have failed due to heat stress, age, or a power surge, resulting in damaged capacitors, relays, or solder joints. Visible burn marks, swollen components, or a burning smell near the board are indicators of this.

  2. 02

    Loose or damaged wiring harness connection

    Wiring / connection

    A loose, corroded, or heat-damaged connector on the wiring harness leading to or from the power board can interrupt proper electrical communication and trigger this fault. Inspect all connectors for secure seating and signs of heat damage or corrosion.

  3. 03

    Supply voltage irregularity

    Wiring / connection

    A voltage drop, power surge, or unstable supply from the home's electrical circuit can cause the power board to register a fault condition. Verify that the supply voltage at the terminal block matches the oven's rated requirements.

  4. 04

    Power surge or brownout event

    Part replacement

    A sudden spike or drop in household voltage can cause immediate damage to board components or leave the board in a locked fault state. If the error appeared immediately after a power event, this is a likely cause.

  5. 05

    Intermittent board communication fault

    Part replacement

    Internal communication errors between the power board and the main control board can trigger a general fault code like F19. This may present as an intermittent error that clears temporarily after a reset but returns during operation.

See the test procedure for each cause

Frequently asked questions about F19

What does F19 mean on a Thermador oven?
F19 on a Thermador oven indicates a miscellaneous power board error. The power board is responsible for regulating and distributing electrical power throughout the oven. This code signals that the board has detected an internal fault that requires diagnostic attention before the oven can be safely used.
Can I fix the F19 error on my Thermador oven myself?
Some causes of the F19 error, such as a loose wiring harness connector, can potentially be addressed by a knowledgeable DIYer after disconnecting power to the appliance. However, diagnosing and replacing a failed power board involves working with high-voltage components and requires a good understanding of electrical safety. If you are not experienced with appliance repair, it is recommended to contact a qualified technician.
Is it safe to use my Thermador oven while it shows the F19 error?
It is not recommended to continue using the oven while F19 is active. A power board fault can affect how the oven controls heating elements and safety systems, which could result in unpredictable behavior or a potential safety hazard. The oven should be powered off until the fault is properly diagnosed and resolved.
Will resetting my Thermador oven clear the F19 error?
A reset, performed by turning off the circuit breaker for 30 to 60 seconds and restoring power, may temporarily clear the F19 code. However, if an underlying issue exists with the power board or wiring, the error is likely to return during normal operation. A reset alone is not a repair and should be followed by a thorough inspection.
How much does it cost to repair a Thermador oven with an F19 error?
Repair costs for an F19 error vary depending on the root cause. If the issue is limited to a wiring connection, the cost may be relatively low, primarily covering a service call in the range of $80 to $150. If the power board requires replacement, parts and labor combined can range from $250 to $600 or more depending on the specific model and labor rates in your area.

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