Zone Valve problem

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Old 02-09-07, 09:33 AM
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Zone Valve problem

I have a 2 zone hot water system. Honeywell zone valves. I replaced one and the heat still does not come on. Is it possible that the ball valve is stuck closed? It seems to turn when I had the motor body off. I also manually opened the valve and still no heat to the one zone of the house. When I installed the new valve and did a test. The thermostat started the boiler and it all seemed to work. And then the boiler shut off after like 2 minutes. This made no sense as I kicked the thermostat up to like 90. Thanks for your reply.
 
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Old 02-09-07, 01:30 PM
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The loop is either airbound or frozen.

Ken
 
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Old 02-09-07, 02:01 PM
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What is airbound? Because it is not frozen
 
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Old 02-09-07, 03:15 PM
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Airbound is when there is air in the pipes where there should be water. Enough air in the pipes, and the pump can't move the water.

Can you tell us what the pressure gauge on the boiler is reading ?
 
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Old 02-09-07, 04:23 PM
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Ok This is the deal. There is water in the radiators concerning the zone in question. I just bled 2 raditators and only water squirted out. So there seems to be enough water. The Psi on the boiler reads 18-20. I have the zone valve manually open. I am confused, Why is there heat in one zone and not the other?
 
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Old 02-09-07, 06:46 PM
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Zone Valve

The only other thing I can think of that Ken didn't mention is the possibility of a manual valve being closed.
 
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