What 1c1c Means
Built-In Microwave, including the microwave-oven combination: KitchenAid publishes 1c1c in the lower-case hex-style form you see on the display - the characters are printed exactly that way on its own page, not as capitals - and gives it one sentence: "There may be a problem with the User Interface/Keypad, or the associated wiring." The control panel and the board behind it exchange messages constantly while a cycle is set up, and this code is raised when that exchange stops making sense. It can mean the panel reported a key that will not come back up, or that the board stopped hearing the panel at all; KitchenAid does not separate the two, which is why it names the wiring in the same breath as the part.
Common Causes of 1c1c
- A key on the touch panel held down by grease, moisture or physical damage
- The loom between the user interface and the control board chafed, loose or corroded
- A failed user interface assembly, which KitchenAid names first in its own sentence
🔧 One Safe Check You Can Try
Let the cavity cool and keep the door shut, then work at the breaker panel rather than at the appliance: power the unit down by switching off the circuit breakers for one minute, power it back up, watch the oven for one minute to see whether the code returns, and verify the oven operates. Before that, wipe the touch panel down with a barely damp cloth once the unit is dead - grease and condensation sitting on a membrane can hold a key down, and that is the one cause of 1c1c you can address without opening anything.
⚠ Why You Shouldn't Go Further Than That
- When the published text names a component and its wiring in the same breath, the wiring is at least as likely as the part, and only a continuity check settles which.
- A microwave stores energy in its high-voltage capacitor, and that charge does not drain when the power goes off; opening the outer case is therefore dangerous even on a unit that has been disconnected for hours.
- Reaching anything inside a built-in unit means pulling it out of its cabinet opening, which on most installations means removing trim and taking the weight of the appliance while it slides.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.