RV Repair: RV hot water tank GC10A-3E, hot water tank, happing

Question
Tank heats OK using electric, but when switched to gas fails to work. Worked fine 2 weeks ago. Could hear click when igniting, now no noise. Checked fuseable link, is OK. Can't even light gas manually. Looked for a fuse in the switch circuit, couldn't find any. RV has been on a permanent campsite for 2 years, no movement to cause disconnects of electrical system to start gas.qe

Answer
that click that you hear is just like the lighters on a grill. it makes a small spark and then it fires up, you have tried with a match to light it, and you are sure that you have LP on and ready? simple things like regulators turned off- or even tank is closed. start small and then work up the system. hope this helps, let me know whats happing with it. I will try to help as you go on.