Dacor Range, Oven, Cooktop Error Code C35

C35 on a Dacor Heritage appliance means the relay board's ambient temperature probe has been detected as shorted. The ambient thermistor monitors the temperature inside the electronics compartment, and a short condition means it is reading near zero ohms rather than a valid resistance. This fault requires inspection of the thermistor, its wiring, and the relay board.

Operating the oven with an active C35 fault is not recommended. The ambient thermistor protects the relay board and control electronics from overheating, and with it shorted, that protection is compromised. Continued use risks damage to the relay board or other control components, which could turn a relatively simple repair into a more costly one.

Repair costs depend on which component has failed. If only the ambient thermistor or its wiring harness needs replacement, parts and labor typically range from around $100 to $250. If the relay board itself requires replacement, costs can range from $250 to $500 or more depending on part availability and labor rates in your area.

A knowledgeable DIYer comfortable working with appliance electronics can attempt to diagnose C35 by disconnecting the ambient probe and testing its resistance with a multimeter. If the thermistor reads near zero ohms, it has shorted and needs replacement. However, accessing the relay board and its components typically requires disassembling the oven control cavity, so comfort with appliance disassembly is important before attempting this repair.

Resetting the oven by cycling power may temporarily clear the C35 display, but the error will return if the underlying fault in the thermistor or wiring is still present. A reset does not repair a shorted thermistor. A permanent fix requires identifying and replacing the faulty component.