It is the internal pressure that determines the proper working of cookers. By noticing three important things, you can find out it is functioning correctly or not. Firstly, check the lid and make sure it is closed properly. Then check out the gentle jingling of pressure control. If it is jiggling, your cooker is working correctly. Most importantly fix the handle with the pan-handle in the right way. If these things are going in the right way, then you can assume that your cooker is working properly.