I just bought a new bbq so i put my old tank on it and everything was fine. It would heat up fast, keep a good flame and keep all four burners on without a problem. However the tank ran out so we bought a new one, hooked it up and now only one burner will work at full flame, and as soon as you put another burner on the flame cuts to half, and the other two burners wont turn on at all. Why is this happening and what can i do to fix it?|||I had the exact same thing happen to me. It was winter time though. All i did was heat up the tank and solved the problem. This may or may not help you. It happened to me 5 times before i figured out the propane was to cold.|||Some of the newer propane pressure regulators have a built in safety system preventing gas leaks if say, the hose got too hot and melted or it was cut by accident. This system can be reset by turning the tank off , closing all burner valves , diconect the tank and then re-connect the tank(also make sure that you use a wrench if you are using the P.O.L. connection,thats the left hand threads inside the valve) Turn on the tank slowly....... too fast and it closes down the flow reacting as if the hose was cut etc...open valve completely, also look for kinks in that hose???? do a soapy water test on the tank valve and connection, they always say that so I should too. Safety first... try lighting again good luck...|||Try replacing the propane tank with a new one.

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