Upon inspection, the Thermidor wall oven was not heating properly. After diagnosing the issue, it was determined that the high limit switch was faulty. I carefully accessed the oven's internal components, located the high limit switch, and safely disconnected it. I then replaced the defective high limit switch with a new one, ensuring proper connections and secure installation. Following the replacement, I tested the oven to confirm that the heating function was restored. The oven now operates efficiently, and the customer is satisfied with the restored performance.