Bosch oven shows E018 and may not start or may shut off unexpectedly

Safety first: This error involves mains voltage. If you are not experienced with electrical work, contact a qualified technician. Always turn off power at the breaker before opening any panels.

• Check supply: Verify that the oven is on a dedicated circuit with the correct voltage (typically 220–240 V in many regions). Flickering lights or tripping breakers may indicate a supply issue.
• Inspect terminal block: Pull the oven out and remove the rear cover to access the terminal block where the power cord or conduit connects. Look for loose screws, burnt insulation, or discoloration. Tighten connections to manufacturer torque specs.
• Examine line filter: Bosch ovens often use an EMI line filter module. Inspect for burns or cracking. Replace if damaged.
• Check main PCB: Remove the top cover and inspect the main control board for burnt components in the power supply area (near the mains input). Any visible damage requires board replacement.
• Test after reset: After tightening and inspecting, restore power and test. If E018 persists, the main control board power supply is likely defective.