Written by
Elena Navarro Appliance Repair Content SpecialistPublished September 11, 2026Updated October 20, 2026
Error codeC-21
ApplianceWall Oven
Quick answer
C-21 on current Dacor ovens means the internal temperature is abnormally high.
Model compatibility: Dacor reuses codes across series and model years, so C-21 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
Abnormally high internal temperature.
C-21 appears on current Dacor ovens when the internal temperature is abnormally high. Owners of a DOC30*977D* combi oven, a Modernist DOB30M977 wall oven or a Modernist Pro range (DOP36M86D, DOP48M86D) will find it in the manual’s information codes.
What to do
The Modernist Pro range manual says to restart the appliance. The wall oven and combi oven manuals list no step for C-21. If the code keeps coming back after a restart, call for service.
Related codes
C-20: oven sensor open or shorted while operating.
C-31: abnormally high PCB temperature, where the manuals say to call for service.
Dacor oven repair in Los Angeles
For a Dacor oven in Los Angeles that shows C-21 again after a restart, call (310) 742-1907 to ask about Dacor oven repair. Keep the model number and the code handy.
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.
