Not enough heat being generated
First things first. Make sure you didn't simply just the tank valve on too fast, causing the excess flow valve to cut-off gas to a trickle. Close tank valve, disconnect and reconnect and then open tank valve very slowly. If that doesn't solve the issue, seeing that you already replaced the regulator, then it's possible it wasn't converted properly. If he didn't change the orifices, leaving in the nat gas ones, then your
flames would be large lazy yellow flames. If that's not the case, then it's possible he might have
put in the incorrect size LP orifices based on a wrong figuring of BTU
rating per burner. See if you can you find the BTU rating on the grill? How many burners are there? Does it state the BTU rating of each burner. If they are different sizes we will need to know BTU specifics for each burner, but if all are the same size, we can divide the total BTU by the # of burners for BTU rating per burner. Orifices have a # stamped on them, so see if you can read the #'s on the existing orifices. If he used the nat gas orifices and drilled them larger and installed a spud, which he redrilled for LP orifice size, then that stamped # won't matter. Something like this is a lot easier to trouble shoot in person! Using a small mirror, see what you can figure out on those orifices and we'll try to determine if they are correctly sized. Hope this helps.Douglas Read More At : BQC300T3 Gas Grill...