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Thermostat works, Zone valve works, but boiler won't fire for one zone.
geesedude
Member Posts: 1
in Gas Heating
I have a 12 yr old Utica gas furnace with 3 zones. I recently changed out the hot water circulating pump, expansion tank, and bled out the system in the process.
Noticed today that Zone 1 wasn't calling for heat with the thermostat on; checked out the zone valve which was warm-hot (the motor portion, not the box/casing), and the valve was open, but wasn't making the boiler turn on.
Any ideas? Thanks!
Noticed today that Zone 1 wasn't calling for heat with the thermostat on; checked out the zone valve which was warm-hot (the motor portion, not the box/casing), and the valve was open, but wasn't making the boiler turn on.
- So i changed out the thermostat to see if that was the culprit; nope.
- I changed out the valve motor with the motor from for Zone 3 (basement) which works (i didn't have a working spare handy), to see if it was the motor gone bad, even though, as i noted, the valve does open; no difference.
- I thought perhaps it's the end switch, so i changed out the entire zone valve assembly for Zone 3 in to Zone 1 (still wired to the Zone 3 thermostat) and raised the thermostat for Zone 3 to see if that would send heat to Zone 1. I mean... it should, right? But nope, same thing - the valve is open but it will not turn on the boiler.
Any ideas? Thanks!
0
Comments
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Is it wired via a relay box?Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream0 -
sounds like a loose wire nut0
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