Still having problems with hot water staying lit. I've replaced the igniter, made sure the flame tube is clean and took off the tip of the orifice and made sure that wasn't plugged. I checked continuity and voltage on the thermal fuse, thermostat and E.C.O all good. I checked voltage on all the wires all are good. The 2amp fuse on the control board is also fine. Thought about replacing the T-stat/ thermal fuse/ECO just so everything is new. Maybe bad Propane pressure or is there such a thing as bad Propane? What else is there to check?