I think and hope mine was just faulty equipment. I tried it for the first time it inflated my tire but also stoped working. I’m returning it and buying one more. Anyways the story.It’s 43f out side so I quickly set it up and set the pump to 44 psi and went into the house and listen for the shut off. It finally did so I went out to check tire was nice and inflated , no idea to what psi because no matter what I did or trice I could not get it powered on again balance screen, no sound, nothing. So again hoping it’s faulty equipment for I really like the price and the pump. It comes with a lot of useful things