Sorry but I'm not that technical and need a bit of advice. I have a campingaz double burner which uses a 904 gas canister. It has a regulator and hose. The problem I have is that it has been in the shed for about three years unused. I have just purchased a new gas canister and I can't get it to work. On the regulator there are two settings F + O. I'm not sure which on is on as neither seem to work. Could be it is just seized up with not being used or am I doing something wrong. Would appreciate help.
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