Marshall Propane Regulators
Lauren (on this forum) had an issue with his furnace not working properly, and if was finally discovered that his regulator was set at 8"of water column. His regulator was then set at 12" and all was good.
I called a tech, and he came out and checked my regulator...it too was set at 8 inches of water column. When the tech tried to adjust it, it had to be turned all the way to the "stop" to get to 11.5 inches. He replaced the regulator.
A few years ago, there was a bunch of bad regulators that had gotten shipped from Marshall, and the local parts dealer and a few of the mobile techs had gotten their hands on them. Seems like some more mis-adjusted Marshall regulators.
Easy for a technician to check, takes less than 30 minutes.
John & Peggy
1SG US Army Retired