Written by
Elena Navarro Appliance Repair Content SpecialistPublished September 11, 2026Updated October 20, 2026
Error codeC74
ApplianceWall Oven
Quick answer
C74 means the logic board lost saved data and restored defaults; a key press cancels the error.
Model compatibility: Dacor reuses codes across series and model years, so C74 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
Logic board E2 checksum failure: saved user data and offsets lost, defaults restored.
C74 on a Dacor wall oven is an E2 checksum failure on the logic board, an error in reading or writing data or a bad EEPROM. User saved data and the service, factory and preheat offsets are lost, and the defaults are restored.
Ovens
Dacor 27-inch and 30-inch single and double ovens with touch-glass control. The manual extract does not name the series.
What still works
An error indication shows, but a key press cancels it. Cooking and cleaning are available, though custom settings or saved files may be lost and are set back to factory default.
What the manual tells the owner
Call customer service to report the incident, then press a key to continue using the oven.
Try setting new values for user data, such as ADDITIONAL SETTINGS and SAVED GUIDE.
If the problem keeps happening, call for service.
A technician also saves a new SAVED GUIDE recipe, recalls it and revisits the settings to see whether re-entering them restores normal operation.
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.
