This is a pacemaker with the guardian system. The pilot and burner go out when the gas valve opens. The burner has a flame for a few seconds then everything goes out. I have found a part laying in the combustion chamber. it looks like a clip. I think this is for the guardian system? There is a pin you can push down. do you know how I can reassemble this so it works? There is also a stand that goes over the pin. any help would be greatly appreciated.