Thermador Oven Error Code E13

E13 indicates a door latch fault. On CT conventional ovens, it means the latch is frozen in place or the latch motor is not receiving power. On CMT convection microwave ovens, it means the control board has not been properly converted for that model configuration. The error may appear alongside a LOCK indicator on the display.

Normal baking and cooking functions may still operate, but you should not attempt to run the self-clean cycle while this error is active. The latch system is a safety interlock for self-clean operation, and a fault in that system means the door may not lock reliably at high temperatures. Address the latch issue before using the self-clean feature.

Repair costs vary depending on the failed component. A replacement latch motor or switch assembly typically falls in the range of $50 to $150 for parts alone. If the control board requires replacement or a service technician is needed to perform a CMT board conversion, total costs including labor can range from $150 to $400 or more depending on your location and the extent of the damage.

A power reset is the recommended first diagnostic step. Turn off the oven at the circuit breaker or unplug it, wait a moment, and restore power. If both door latch switches show the door as open after the reset, the E13 error can be cleared. If both switches indicate the door is locked, E13 and the LOCK display will return and remain until the underlying latch problem is repaired.

Start by power cycling the oven to determine whether the latch switches are reporting the door as locked or open. If the door appears open per the switches, clear the error and monitor for recurrence. If the latch is physically stuck, inspect the mechanism for obstructions or heat damage. A faulty latch motor, failed switch, or broken wiring harness will require part replacement. On CMT models, verify that the control board conversion procedure has been completed correctly.