Thermador range displays Er24 and oven functions may be disabled.

Safety first: This involves live voltage. If you are not trained, contact a qualified electrician or technician. Always turn off power before tightening connections.

• Power reset: Turn off the range at the breaker for 5 minutes, then restore power.
• Check other loads: Avoid running multiple high-draw appliances on the same circuit, if improperly wired.
• Inspect terminal block: With power off, remove the rear cover to access the terminal block. Tighten all lugs and look for heat discoloration.
• Measure voltage: With power on, verify that supply voltage at the terminal block meets Thermador specifications (typically 208–240 VAC).

If supply voltage is correct and connections are solid but Er24 persists, the power filter or main control board may be misreading voltage and require replacement.