I received this heater and followed the instructions to get it setup. Firstly, the instructions are wrong, it keeps referring to UP and DOWN buttons, this has neither. I tried all sorts of button holding and combinations but could not get this to prime the fuel pump. I contacted support and they keep telling me the same thing, turn ON and hold the DOWN button for 7 seconds. This does not work on this machine. I have told them that, I have sent videos of me doing exactly that, of doing other button combos and holds, and it does not go into priming mode. Unit is faulty and all VEVOR is doing is telling me to turn it on and hold the button. They have sent the same response five times and I am getting tired of it. Useless machine, useless support.