Dacor Oven Error Code C72

C72 indicates a TWI communication error, meaning the logic board and relay board have lost contact with each other for at least 6 seconds. These two boards exchange data continuously to control oven functions like heating element switching. When that communication link fails, the oven triggers this fault and stops operating as a safety precaution. The fault is rooted in the communication wiring between connectors J7-J23 and J8-J23.

No, you should not attempt to operate the oven while C72 is active. The error indicates the control boards cannot communicate, which means the oven cannot properly manage its heating circuits. Operating an oven in this fault state could result in uncontrolled heating or other unpredictable behavior. Discontinue use until the fault is diagnosed and resolved.

Repair costs vary depending on the root cause. If the issue is simply a loose connector, a service call fee of roughly $75 to $150 may be the only cost. If the logic board needs replacement, parts and labor combined typically range from $300 to $600 or more depending on the specific model and local labor rates. Getting a diagnostic estimate from a qualified technician before authorizing repairs is recommended.

A knowledgeable DIYer can attempt the first diagnostic step, which involves locating the communication connectors J7-J23 and J8-J23 between the relay and logic boards and firmly reseating them. If the error clears after reconnecting the harness, no further repair may be needed. However, if the oven continues to reset repeatedly or the error returns, replacing the logic board involves working near high-voltage components and is best handled by a qualified technician.

A power reset by turning off the circuit breaker for 30 to 60 seconds may temporarily clear the error if the communication disruption was a one-time event. However, if the underlying cause is a loose connector, damaged harness, or failing control board, the C72 code will return. Continuous resets or rebooting behavior after a reset is a strong indicator that the logic board needs to be replaced.