Apr 14, 2010 · Most commonly when you have a zone valve that won't close it could be one of three things; the powerhead, the valve assembly, or the manual valve lever. Below are some …

Mar 15, 2023 · Boilers - Home Heating Steam and Hot Water Systems - Honeywell V8043 zone valve sticking open - Hi all (again), I am working on diagnosing a zone valve which appears to …

Feb 9, 2011 · Boilers - Home Heating Steam and Hot Water Systems - Honeywell 8043 zone valve stuck open - I have a twist on the zone valve threads-- I have a Honeywell 8043 zone …

Mar 21, 2012 · Boilers - Home Heating Steam and Hot Water Systems - Zone Valve stuck open - Hi there! I just bought a house that seems to have an issue with one of the zone valves being …

Dec 26, 2025 · Gas and Oil Home Heating Furnaces - Zone Valve Stuck Open - Have 17 year old Energy Kinetics System 2000 with two hot water zones which feed radiators in forced air ducts …

Apr 12, 2021 · Boilers - Home Heating Steam and Hot Water Systems - diagnose a boiler zone valve or thermostat stuck open - I turned my old style Honewell round analog thermostat way …

Oct 10, 2007 · Boilers - Home Heating Steam and Hot Water Systems - Zone valve stuck open/won't close - I just bought a house and i am having an issue with one of the zone valves.

Dec 22, 2019 · Boilers - Home Heating Steam and Hot Water Systems - Zone valve was stuck closed - now what - Hi folks, Long time lurker, first time poster. I suddenly lost heat in one of 3 …

Oct 23, 2013 · Boilers - Home Heating Steam and Hot Water Systems - Stuck zone valve - This morning my 2nd floor zone valve stuck open. It's 74 degrees up there right now, a quick tap on …

Mar 7, 2025 · Open one of the yellow wires in the splice and see if the valve closes. If it remains open.... the valve may be stuck internally. A 24vac motor is used to open the valve and an …