Tested and found both pilot out. Tried to light but they would not, Removed a pilot line and depressed safety. Smelled no gas. Found relief plug on regulator blocked with grease. Removed and lit pilots. Heated grill up. Unblocked grease and burnt off with torch. Little ball moves freely now. Put back in and tested. Grill works. If it happens again the 3/4 regulator valve should be replaced.