1 circulator pump working fine for Zone2 All Zone valves are functioning properly when calling for heat no air came out system seems to flow without a problem Bled zone 3 individually since its a very short loop but still doesn't work. All zones seem to work fine for a short period of time. Bled entire Hydronic system of air with several buckets per zone. Zone 2, Main floor of ranch style house working without problems No heat Zone 1 and 3 basement rooms near heating system small loops also noted loud pipe banging from air in system noticed Air purge valve releasing air several times and leaking water on expansion tank noticed the problem after Oil tank was extremely low on fuel problem started about 2 weeks ago, system worked fine before When calling for heat zone vales open properly and feed pipe gets extremely hot but 5' down the line I notice pipe temp drops. Basemnet zones (1 and 3) are not working. I just lost my detailed thread before I could post it so ill make a quick one.
