Written by
Lena Hartwell Appliance Care EditorPublished October 27, 2026
VERIFIED
Error codeC73
ApplianceWall Oven
Two situations behind C73
A double oven detects only one power board, or a single oven detects none.
Two upper boards, or two lower boards, are connected to the same logic board.
Timing and effect
The logic board must find the condition within the first 5 seconds after power is restored. While it is present the oven has no functions. Dacor describes the error as reversible.
Oven range
Touch-glass single and double wall ovens of 27 and 30 inch, as listed in the Dacor Wall Oven Service Manual. The series is not named.
What to do
Call for service. The manual’s checks cover the wiring, the board ID switch settings and software compatibility, all before a board is replaced, and a technician carries them out. Where a replacement is needed, a relay board comes first and the logic board last.
To arrange Dacor wall oven repair for a C73, call (415) 687-5926. Tell us whether the oven is single or double, give the model number and state the code.
Model compatibility: Dacor reuses codes across series and model years, so C73 may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What this code means
Communication error from the wrong number or arrangement of power boards on the logic board.
Important safety warning. Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.
Seeing this code on your Dacor appliance?
Book a specialist visit for a clear estimate and approval before any repair.
You submit a request with your appliance model and symptom, we confirm an appointment window, and a technician performs an on-site diagnosis. You then receive a clear estimate and decide whether to proceed before any repair begins.
Yes. We provide an upfront estimate after diagnosis. No parts are ordered or installed until you approve the work, so there are no surprise charges.
Replacement parts are selected for the exact model and confirmed with you before ordering or installation.
Service areas are listed on the Locations page. Contact us with your ZIP code to confirm current coverage for your address.
Ready to get your Dacor appliance working again?
Book a repair online or call us — clear estimates and approval before any repair work begins.
