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Error code reference

BKI Oven Error Code Louu

Oven is in preheat cycle and has not yet reached set temperature.

BKI codesBKI oven codes

Oven is in preheat cycle and has not yet reached set temperature.

First step from the service manual

Wait for preheat cycle to complete; display will change to 'rEdy'.

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

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What Louu means on a BKI oven

The 'Louu' display on a BKI oven is not an error code in the traditional fault sense. It is a status indicator that appears during the preheat cycle, signaling that the oven cavity temperature has not yet reached the operator-programmed set point. The control board monitors the temperature sensor continuously and displays 'Louu' to communicate that heating is actively in progress but the target temperature has not been achieved. This is expected behavior during startup and does not indicate a malfunction under normal circumstances.

The oven's heating system, including the heating elements or burners and the temperature sensor circuit, is engaged during this period. The control board compares the live sensor reading against the set point and maintains the 'Louu' display until the two values converge. Once the oven reaches the programmed temperature, the display transitions to 'rEdy', confirming that cooking conditions have been met. The duration of the preheat cycle depends on the starting cavity temperature, the set point selected, and the overall condition of the heating components.

If 'Louu' persists for an unusually long time without transitioning to 'rEdy', it may indicate an underlying issue such as a degraded heating element, a faulty temperature sensor providing inaccurate readings, or a problem with the control board's ability to drive the heating circuit to full output. In those cases, further diagnostics would be warranted to determine whether the oven is actually heating and whether the sensor is returning accurate temperature data.

Source: manufacturer service documentation.

Common causes of Louu

  1. 01

    Normal preheat in progress

    Wiring / connection

    The oven is functioning correctly and is still climbing to the set temperature. No action is needed; the display will change to 'rEdy' automatically once the target temperature is reached.

  2. 02

    Degraded or partially failed heating element

    Part replacement

    If the preheat cycle takes significantly longer than usual before reaching 'rEdy', a heating element may be weakening or partially failed, reducing the oven's ability to heat efficiently.

  3. 03

    Faulty temperature sensor

    Part replacement

    A temperature sensor that reads lower than actual cavity temperature will cause the control board to continue heating past normal preheat duration, keeping 'Louu' displayed longer than expected.

  4. 04

    High set point relative to ambient conditions

    Wiring / connection

    When the oven is started cold in a low-ambient-temperature environment or a very high set point is programmed, preheat time will naturally be longer, prolonging the 'Louu' display.

  5. 05

    Control board output issue

    Part replacement

    A control board that is not properly driving the heating circuit to full output can result in a slow or incomplete preheat, causing 'Louu' to persist without transitioning to 'rEdy'.

See the test procedure for each cause

Frequently asked questions about Louu

What does Louu mean on a BKI oven?
'Louu' is a status message indicating that the oven is in its preheat cycle and the cavity temperature has not yet reached the programmed set point. It is a normal operational display and not a fault code. The display will automatically change to 'rEdy' once the oven reaches the target temperature.
How do I fix the Louu display on my BKI oven?
In most cases, no fix is needed. Simply allow the preheat cycle to complete and wait for the display to change to 'rEdy'. If 'Louu' remains on the display for an unusually long time without progressing, inspect the heating elements and temperature sensor for signs of failure, as either component could be slowing the preheat cycle.
Is it safe to use my BKI oven while it shows Louu?
The oven is actively heating while 'Louu' is displayed, so the cavity is not yet at the correct temperature for cooking. For food safety and quality reasons, you should wait until the display reads 'rEdy' before loading food into the oven. The heating system itself poses no unusual safety risk during this stage.
Will resetting the oven clear the Louu display?
Resetting the oven will restart the preheat cycle, which means 'Louu' will appear again as the oven begins heating from whatever the current cavity temperature is. The display only clears to 'rEdy' when the set temperature is actually reached, so a reset does not skip or bypass the preheat process.
How much will it cost to repair my BKI oven if Louu will not go away?
If a component failure is causing an extended or incomplete preheat, repair costs vary depending on the faulty part. Temperature sensor replacements typically range from around $20 to $80 in parts, while heating element or control board replacements can range from $75 to several hundred dollars, not including labor. A proper diagnosis should be performed before ordering parts to confirm which component is at fault.

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