I've had problems the last few days with my gas grille not wanting to light .
Yesterday, I pulled it all apart and cleaned the burners gas jets, etc....
Still wouldn't work, I removed the rubber line between the regulator and the gas manifold on the grille, turned the LP tank on and got gas flow .
I was stumped .
Finally found the owners manual, kinds surprised I still had it, I got the grille 13 years ago .
Well, there is a feature on this grille (Weber), that is called an excess flow limiter, somewhere in the gas manifold on the grille .
Best that I can tell, with the high temps we've been having here, average is around 112-114 F., the LP tank is over pressurized, it sits mostly in the sun and the flow limiter 'set' and won't allow any gas to flow .
Reset procedure, is remove the line from the LP tank, turn all of the burner controls to high for a few minutes, turn them off, reattach the line to the tank and try relighting .
I tried lighting my grille this morning after doing this and it works fine now .
Don't know if all gas grilles have the safety device or not, but just a tidbit of info, I didn't know about before .
I'm putting a sun shield around the tank today, so it won't happen to me again !!!!