What C-20 means on your Dacor range (dacor range c-20)
Dacor range c-20 is the Modernist Pro Range’s primary oven cavity-sensor failure: while the oven is actively heating, the main PBA has read the oven sensor circuit as open or shorted, meaning it can no longer trust the reported cavity temperature. This affects the oven beneath the cooktop, not the burners, which typically continue to operate normally. Because the problem occurs mid-operation rather than at startup, the oven halts heating rather than continuing on an unverified reading.
Symptoms
What follows helps you confirm that your Dacor range has this specific problem rather than one that merely resembles it on a range.
- C-20 appears mid-cycle, typically after the oven has already been heating for some time.
- The oven stops heating and the current cook or bake cycle cannot continue.
- Displayed oven temperature may freeze or jump erratically just before c-20 appears.
- The problem can recur every time a cycle reaches a similar point in the bake.
- Cooktop burners are unaffected, since c-20 is isolated to the oven sensor circuit.
Common causes
Any of the following can leave a Dacor range in this state, and telling them apart on the range decides whether a part is needed at all.
- Failed oven temperature sensor — the sensor element has shorted or opened, often after years of high-heat cycling.
- Damaged sensor wiring — a wire chafed against a hot surface inside the cavity liner can short or break.
- Loose sensor connector — a connection point behind the cavity has partially disconnected from vibration or thermal movement.
- Corrosion at the sensor plug — moisture exposure over time raises resistance until the reading is unreliable.
- Main PBA sensor-input problem — less commonly, the board’s own sensing circuit is misreading a healthy sensor.
Troubleshooting steps you can try
Work through these checks on your range in order before calling anyone out, and stop wherever mains voltage, gas, a hot surface or a sealed component on the range is involved.
- Power-cycle the range at the breaker and try a shorter, lower-temperature cook to see if c-20 recurs quickly.
- Note approximately how long into a cycle the problem tends to appear, since a consistent pattern points more strongly at heat-related wire fatigue.
- Avoid running long, high-temperature cycles like roasting or self-clean until the sensor is confirmed good.
- Confirm cooktop burners still function normally, which narrows the problem to the oven side of the range.
- Have your model and serial number ready so the correct sensor part can be matched before the technician visit.
Parts a technician may replace
For this problem, the oven temperature sensor, sensor wiring harness, and main pba on your Dacor range are the components in scope. Which of them has failed on the range is established on site before any range part is sourced.
When to call a technician
C-20 is rated High severity because the oven cannot verify cavity temperature once it fires, so book a technician rather than continuing to run cook cycles that keep cutting short. A High-severity problem on a range is not one to work around: shut the range down and book a technician. Your range is handled by an independent workshop with genuine OEM or trusted-supplier parts and a 30-day labor warranty.
Related help and Dacor resources
If the C-20 condition keeps coming back on your range after these checks, book Dacor range repair, read the rest of our range problem pages, or schedule a visit. Manufacturer specifications for your range are at www.dacor.com.
