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Error code reference

Electrolux Oven Error Code bSOt

Boiler SSR NTC overtemperature (NHSB)

Electrolux codesElectrolux oven codes
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What the bSOt error code actually means

Your Electrolux oven has detected that a key electrical switching component, which controls the boiler, is getting too hot and has shut the boiler down to prevent damage. This is usually caused by a clogged air filter, a broken cooling fan, or a worn-out part inside the oven. The oven will not resume normal operation until the component cools down and the underlying cause is addressed.

Diagnostic procedure

The full bSOt procedure

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1
First diagnostic step
Check room temperature; clean the air intake filter; check cavity insulation; verify heat sink integrity; Check X42 on ACU; change thermal pad; replace SSR.
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Most common causes of bSOt

Ranked by how often they cause this code
  1. 1Clogged Inlet Air Filter
  2. 2Cooling Fan Failure
  3. 3Degraded or Improperly Seated Thermal Pad
  4. 4SSR Internal Fault
  5. 5Elevated Ambient Temperature or Compromised Cavity Insulation

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Questions people ask about bSOt

What does bSOt mean on a Electrolux oven?
The bSOt code means the NTC temperature sensor on the boiler Solid State Relay heat sink has detected a temperature at or above 95°C. As a protective measure, the control system shuts down the boiler to prevent component damage. The boiler will not restart until the heat sink cools to 75°C and the underlying cause is corrected. This is a thermal overtemperature fault, not a software or communication error.
Is it safe to keep using my oven when the bSOt code is displayed?
You should not attempt to bypass or ignore this fault. The bSOt code indicates the boiler's switching component has exceeded its safe operating temperature, and the control system has shut the boiler down as a protective measure. Continuing to force operation could damage the SSR, the ACU, or associated wiring. Allow the unit to cool, address the root cause, and confirm the fault is cleared before resuming use.
How much does it cost to repair an Electrolux oven showing the bSOt error?
Repair costs vary depending on the cause. Cleaning the air filter costs nothing beyond a few minutes of time. A replacement cooling fan typically runs between $50 and $150 in parts, plus labor if a technician is needed. A new SSR can range from $80 to $200 or more depending on the specific model. Full diagnostic and repair labor from a certified technician generally adds $100 to $200 on top of parts costs.
Can I fix the bSOt error myself, or do I need a technician?
Some causes of the bSOt error are DIY-accessible. Cleaning the inlet air filter requires no special tools and should always be the first step. Checking the cooling fan for operation is also straightforward. However, replacing the thermal pad, inspecting connector X42 on the ACU, or replacing the SSR involves accessing internal components and working near high-voltage parts, so those steps are best handled by a qualified technician.
Will resetting the oven clear the bSOt error code?
A power reset may temporarily clear the displayed code, but the fault will return as soon as the SSR heat sink reaches 95°C again if the underlying cause has not been fixed. The thermal protection will activate at 95°C and only release at 75°C. A reset without corrective action, such as cleaning the air filter or repairing the cooling fan, is not a lasting solution.

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