Electrolux Oven Error Code CSOt

CSOt indicates that the NTC thermistor monitoring the Solid State Relay heat sink inside the oven has detected a temperature at or above 95 degrees Celsius. This is referred to as a cavity SSR NTC overtemperature fault. The oven shuts down automatically to protect the SSR from heat damage and will only allow a reset once the monitored temperature falls back to 75 degrees Celsius. The root cause is almost always related to restricted airflow, a failed thermal pad, or a heat sink problem.

No. The oven is designed to stop operation when this fault appears specifically because continued use could damage the SSR or create a heat-related hazard. Do not attempt to bypass the shutdown or force the oven to operate while this code is active. Allow the oven to cool, address the underlying cause, and confirm the fault is cleared before resuming use.

Costs vary depending on what is causing the fault. Cleaning the air intake filter costs nothing beyond your time. A replacement thermal pad is generally an inexpensive part, typically in the range of a few dollars to around fifteen dollars. Replacing the SSR itself is a more significant repair, with parts typically ranging from around forty to over one hundred dollars depending on the model, plus labor costs if a technician is involved.

Some steps are DIY-friendly, such as cleaning the air intake filter and checking that room ventilation around the oven is adequate. However, inspecting and replacing the thermal pad, checking the X41 connector on the ACU, or replacing the SSR typically requires disassembling parts of the oven and working near high-voltage components. If you are not comfortable with appliance electrical work, a qualified technician should perform those steps.

A reset becomes possible only after the SSR heat sink temperature drops back below 75 degrees Celsius, but simply resetting the unit will not fix the underlying problem. If the cause, such as a clogged filter or a bad thermal pad, is not corrected, the fault will return during the next use. A reset should be performed only after completing the appropriate diagnostic and repair steps.