Written by
Lena Hartwell Appliance Care EditorPublished October 27, 2026
VERIFIED
Error codeC-20
ApplianceWall Oven
C-20 in brief
Three Dacor manuals define C-20 the same way: the oven sensor has failed open or shorted during use.
Where the code is listed
Modernist DOB30M977 wall oven
DOC30*977D* combi oven
Modernist Pro DOP36M86D and DOP48M86D ranges
Owner steps
These manuals give the cause only in their information code tables. No owner step is printed beside C-20, so the practical move is to record the code and ask for service.
C-21: internal temperature that has climbed too high.
Dacor oven service in San Francisco
For a Dacor oven in San Francisco that shows C-20 again, open Dacor wall oven repair and call (415) 687-5926. Tell us what the display says, which model you own and what you tried.
Model compatibility: Dacor reuses codes across series and model years, so C-20 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
C-20 means the oven sensor is open or shorted while the oven is operating.
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.
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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.
