if you look at the pic , the zone valve on the left is for the upstairs. you guys know i can't get up there , so for the last 4 years i never heated up there. i was looking at the pic my son took , while he was downstairs running the boiler to temp to try and beld the supply line on the Taco pump. then it hit me , theres air under that zone valve. had him open it manually , then it went a full turn to close. the pipe above was real hot. i have heat now
lol. so i guess when i run out of coal
, i will have him bled them up there. then a couple times during the heating season turn the stoker down and use the boiler for couple days.