Dacor Range, Oven, Cooktop Error Code C72

C72 indicates a communication failure between the logic board and the relay board inside the appliance. These two boards must exchange signals for the appliance to control heating elements and other functions. When that communication link is broken, the appliance displays C72 and stops operating normally. The fault can be caused by wiring issues or a failed board.

No, you should not use the appliance while C72 is active. The error means the control system cannot reliably communicate internally, so cooking functions may not respond correctly or may behave unpredictably. Continued use before the fault is repaired risks unsafe operation or additional damage to the control boards.

Repair costs depend on which component has failed. If only a wiring harness needs repair or replacement, costs are generally in the range of $100 to $250 including labor. Replacing a relay board or logic board typically adds to that cost, with parts and labor often ranging from $250 to $600 or more depending on the specific model and local labor rates. Dacor appliances tend to have higher parts costs than budget brands, so getting a firm quote from a qualified technician before authorizing repairs is advisable.

A knowledgeable DIYer can start by unplugging the appliance and checking that the harness connectors between the logic and relay boards are fully seated and free of visible damage. However, if the wiring looks intact, diagnosing which board has failed typically requires component-level testing that most homeowners are not equipped to perform. Board replacement also involves working near high-voltage components, so professional service is recommended if the basic connection check does not resolve the issue.

A power reset, performed by unplugging the appliance or switching off the circuit breaker for a few minutes, may temporarily clear the code if the cause was a transient communication glitch. However, if there is underlying wiring damage or a board failure, the C72 code will return once the appliance powers back up. A persistent C72 after a reset confirms a hardware fault that needs physical repair.