Stuck zone valve needs replaced but which one?

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Old 01-17-18, 04:18 AM
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Stuck zone valve needs replaced but which one?

I have 3 zones, 1 calls for heat 24/7. I shut the stat off and it still pumps out heat so Iím guessing the zone valve isnít closing....how do I determine which of the 3 needs replaced ....if that is the problem....I think I can replace the valve itself....it appears to be just a few wires and screws
 
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Old 01-17-18, 10:41 AM
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Wow...I donít feel so bad..tougher issue than I thought
 
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Old 01-17-18, 11:15 AM
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The one that doesn't close when the stat is off is the bad one. Was that a trick question.

When all 3 stats are off do you still get heat to one zone. If you do, that's your problem zone.

What kind of zone valves do you have. 3 or 4 wires. You have a lever on the zone valves.

See if you can move it easily. Closed it should have resistance but will move. OPEN and it should move without resistance.

If your stat is closed and the lever moves freely, your valve is stuck open.

Pics would be very helpful.

Hope this helps a little.
 
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Old 01-17-18, 04:26 PM
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Ok...4 wire zone valves....yes I still get heat when all stats are off.....itís tough to tell if itís loose or providing resistance ....hence my problem .....being tech challenged Iím not sure how to post a pic
 
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Old 01-17-18, 04:32 PM
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Welcome to the forums.

This will help with pictures..... How-to-insert-pictures

If the valve is stuck open..... the manual level moves very easily.... like it's broken.
When the valve is closed.... the lever is very hard to move.
 
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Old 01-17-18, 04:41 PM
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Thanks for the help. Iím doomed....Iíll just replace one and if it doesnít solve the problem
i will swap things back and move on to the next one....may have to do it three times but eventually it should work
 
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Old 01-17-18, 08:00 PM
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The other non technical thing you can do is to shut off all three thermostats. The lines leaving the two working zone valves will get cooler. The line from the stuck one will remain hot. It may take an hour or so to cool down enough for you to feel the difference.
 
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