might try a good block flush too, the lower area has pretty small passages that do tend to sludge up, and that'd happen with a lot of sitting .... and make sure you have a good thermostat
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics
