Dacor Range, Oven, Cooktop Error Code C77

C77 is a keypad detection error specific to Dacor Heritage series appliances. It means the main control board cannot establish a connection with the keypad, which is the touch or button interface used to control cooking functions. The appliance will not operate normally until the communication issue is resolved. The fault typically points to a wiring, connector, or keypad assembly problem.

Cycling power to the appliance by unplugging it or switching off the circuit breaker for a few minutes may temporarily clear the C77 code, but the error will return if the underlying wiring or keypad fault has not been corrected. A power reset is a reasonable first step to confirm whether the fault is persistent, but it does not repair damaged connectors, broken wiring, or a failed keypad.

Repair costs depend on the root cause. If only a connector needs reseating, the cost may be limited to a service call fee, typically in the range of $75 to $150. A replacement keypad assembly for a Dacor Heritage model generally falls in the range of $100 to $300 for the part alone. Control board replacement is the most expensive scenario, with parts and labor potentially totaling $300 to $600 or more depending on the specific model.

Some causes of C77 are accessible to a knowledgeable DIYer, such as reseating a loose wiring harness connector. However, accessing the internal connectors and keypad assembly on a Dacor Heritage unit typically requires disassembling the control panel, which involves working near electrical components. If you are not comfortable with appliance disassembly and electrical inspection, a qualified technician should perform the diagnosis.

When C77 is active, the control board cannot properly communicate with the keypad, which means the appliance may not accept input or may suspend operation entirely. Attempting to use the oven in this state is not recommended, as the control system is not functioning as intended. The appliance should be left powered off until the fault is diagnosed and repaired.