Two tables, never interchangeable
A Legacy Dacor wall oven — the pre-2016 Classic ERC platform used across the ECS, ECD, PCS, PCD, MCS, and MCD series — answers in a short F0-through-F8 range straight from Dacor’s own service literature. A Samsung-era Modernist wall oven, such as the DOB30M977DS, answers instead in a longer C-prefixed set. The two tables share nothing: an F-code from a Classic board and a C-code from a Modernist board describe entirely different diagnostic systems, so confirming which generation stands in the kitchen comes first.
What the Legacy F-codes report
On the Classic ERC board, F0 points to a shorted or jammed input device, F1 is the ERC’s own watchdog flag for a bake or broil failure, F2 signals a runaway-heat condition, F3 and F4 point at the oven temperature sensor or its wiring, F5 and F6 call for the ERC itself to be replaced, and F7 and F8 concern the door-lock circuit.
What the Samsung-era C-codes report
On a Modernist wall oven, C-20 and C-21 flag an open, shorted, or overheating oven sensor, C-30 and C-31 do the same for the control-board sensor, C-F0 and C-F2 mark a communication break between boards or the touch panel, and C-A2 points at the cooling fan.
When to call
A fault that clears on a full power cycle is worth noting and moving past; one that returns points to the sensor, the wiring, or the board named above, and needs an experienced technician with a genuine OEM or trusted-supplier part matched to the exact generation. See the oven error codes page or the wider error-codes library, then book oven repair.