When i put my oven on it It starts and then says error and beeping

F3
Key panel (touch pad) shorted This code will occur if a shorted key panel is detected
continuously over 60 seconds. Replace key panel (also called touch
pad).

logic board needs replacement if it cannot be reset.

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Basic Microwave Oven TroubleshootingTips

heatman101

1.tighten nut at sensor socket 2.check connections to socket 3.does error go away when sensor is used,if so probably bad socket,replace

F4
Open humidity sensor, will occur if humidity sensor is detected as being open continuously over 5 seconds Replace humidity sensor

F3 Key panel (touch pad) shorted This code will occur if a shorted key panel is detected continuously over 60 seconds. Replace key panel (also called touch pad).

The error code F3 indicates an oven sensor problem. The oven sensor is most likely the failed part. The oven sensor probe must have the correct resistance readings at specific temperatures. When the electronic range control (ERC) cannot identify the correct resistance of the oven sensor or the resistance is way out of specs F3 will display.
I recommend calling a service technician to diagnose and repair your oven.

Try first unplugging power cable for ten minutes, and see if it clears the error.

Put the probe in the oven and beeping stopped. Left it in overnight and next morning took the probe out and there was no beeping. Have not heard beeping all day. Don't know why this worked but it did.

LaMason

I started having the same problem with my KBMC140HSSO. You cannot see the error codes without disassembling the control panel (the codes are on another display that covered by the front panel). After doing so I found the error code to be F2, E3 which is "Key held down too long, or key shorted". I am ordering a replacement keypad and will report back if this fixes the problem.