No problem. I am accustomed to a more positive experience anyway.
Just a tip though.....you say they ran it on propane which 10.5 inches water column with different valve and orifices...then you say you brought it back to run on natural gas....makes no sense...the unit can not run on both. It must be converted to run on one or the other.
Never heard of such a situation in 20 years of running it on both...natural gas is only 3.5 inches water column. If you are running a LP unit on natural gas you will ruin the unit.
If it started at 10.5 " then it sounds like a pressure issue.
Now speaking of bull....running this unit on LP at one place and natural at another?? I think you better have someone better suited mechanically service the unit for you. The information you provided is viable information at all.
This is a very easy unit to work on and not real technical at all...if you have spark...and you fuel....then it is a pressure concern.
I will forward to customer service right now.
Charge? - Nothing
My advice - Free
My recommendation - have someone who knows what their doing actually see the unit and work hands on. WITH THE RIGHT FUEL
I wish you the best and I am sending to customer service as fast as I possibly can!