Is your pressure cooker giving the dreaded C6 error message while emitting alarming beeps?
Follow this guide to identify what's wrong and how to fix it!
https://www.ifixit.com/Guide/How+to+Fix+the+C6+Error+for+a+Pressure+Cooker/147233
The C6, C6L and C6H error messages mean that one of the pressure sensors is not working. This is usually caused by deposits on the sensor contacts. Cleaning the contacts is likely to solve the problem.
This manual was written using an Instant Pot Duo, but the general procedure can be applied to many electric pressure cookers as most use similar electronics and sensors.