When the electric pressure cooker can't be opened, there are several possible reasons that need to be investigated and solved:

First, check whether there is a problem with the check valve. If the lid can move slightly, it means that there is no air pressure inside, and the check valve may not return to the release position. The solution is to use a hard object, such as chopsticks, and gently press the check valve to help it reset, so that the lid can be opened.

secondly, if the resistance of rotating the pot cover is large, it may be because there is still high pressure in the pot. In this case, you need to let the pressure release naturally. You can choose natural cooling and let the pressure drop slowly. Unless necessary, it is not recommended to lift the pressure valve forcibly to release the pressure to prevent accidents.

finally, if there are too many sundries accumulated inside the lid, it may not open. It is necessary to clean the residue inside the pot cover regularly, and ensure that the pot cover is kept clean, so as to avoid the jam caused by dirt.

generally speaking, to solve the problem that the electric pressure cooker can't be opened, we need to take corresponding measures according to specific reasons, such as cleaning and adjusting the check valve or waiting for the pressure to be released naturally, so as to ensure the safe and smooth use of the electric pressure cooker.