Both 1C1C and 1C2C get identical wording from KitchenAid: a possible keypad or wiring problem. The listed step is a breaker reset.
Model compatibility: KitchenAid reuses codes across series and model years, so 1C1C / 1C2C 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
A possible problem with the user interface/keypad or its wiring.
Two codes, one explanation
KitchenAid describes 1C1C and 1C2C with matching text for a wall oven: the user interface/keypad, or the wiring serving it, may have a problem. The help text gives no difference between the two.
Understanding “user interface”
It is the control panel where you enter temperatures and functions.
Naming it puts the focus on the panel or its connection, not on a heating or door component.
The word “may” matters. The code points in a direction; it does not prove the keypad has failed.
Steps from KitchenAid
Find the breaker that feeds the oven and switch it off.
Leave it off for one minute.
Switch it back on.
Watch the display for roughly a minute to see whether 1C1C or 1C2C comes back.
Operate the oven to verify that it works.
This reset happens at the breaker panel. No keypad button sequence is given for clearing the code.
When the code returns
Past the reset the article has nothing more for owners. A technician is the right person for a code that reappears, since the control panel and its wiring are what need examining. The article has no directions for opening the oven, testing the keypad or tracing wiring. It does not say whether the oven can still cook with the code on screen.
For a 1C1C or 1C2C that survives the breaker reset, our Los Angeles line is (310) 363-8964. Say which of the two codes you saw. The oven repair page has further details.
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 KitchenAid appliance?
Book a specialist visit for a clear estimate and approval before any repair.