Came out today for a heating issue. Found the Weil McLain boiler model # CGA-8 PIDN, cp #CP7926873. Upon inspection I found one room upstairs that had a runaway zone valve. The zone valve was left in the open position. I did close the zone valve so the room would not continue to heat. The boiler is on a constant loop and Chud powers down the system after every winter. Upon heating season Chud will return to turn it back on. Bill out per dispatch.