Char Broil Commercial Series. My deceased wife and I purchased a Char Broil Commercial Series BBQ

Question

My deceased wife and I purchased a Char Broil Commercial Series BBQ Grill in 2005. The grill has worked flawlessly until this Spring when I attempted to light it with the Ignitor Switch. Only a small flame came out around the burners and I thought that maybe the LPG might have gone bad (the LPG Canister gauge showed full). I swapped this can out for a new canister and much to my surprise the burners still don't light up like they used to. The grill of course has a stainless cover and I cover the grill with a vinyl cover that is made for the grill. What do you think is wrong? We (or now I) have used this grill less than 15-times and the burners shouldn't have gone out this quick. My personal email address is: [e-mail]. Thanking you ahead of time. Paul