Continually getting heat out of one of two zones

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Old 01-20-13, 10:19 AM
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Continually getting heat out of one of two zones

Hi, I have a Weil Mclain gas boiler that provides heat and hot water for the house.

Last year about this time of year I started getting heat on my downstairs zone that would not shut off.

My buddy and I cut out and replaced the (zone) FLOW CHECK valve for the downstairs zone.

This year I am again having continous heat downstairs again and I am not sure what to do.

The second zone and hot water are fine.

I had replaced the thermostat on the first floor last year and changed the batteries just after this started again.

Downstairs have one thermostat and there is a kick space heater under the kitchen cabinets attached to the downstairs heat.

Any ideas on what I might be able to do at this time?
 

Last edited by NJT; 01-20-13 at 04:09 PM.
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Old 01-20-13, 10:24 AM
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You need to find out if it's mechanical or electrical.
What zone valves are you using ?
 
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Old 01-20-13, 10:27 AM
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Meant Flow valve not zone valve
 
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Old 01-20-13, 10:31 AM
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So....no zone valves.
Which means you have two circulator pumps.....is that correct.
 
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Old 01-20-13, 01:09 PM
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yes I have 2 circulator pumps. attached to the first floor is a Honeywell actuator vc8710-11
 
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Old 01-20-13, 04:06 PM
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The actuator on the boiler should not be the problem. That is only a 'diverter' valve that will only come into play when the boiler is making domestic hot water.

I'm not sure what you mean by "attached to the first floor" because that valve should feed BOTH zones.

Manual here:

http://www.weil-mclain.com/en/assets...0-290_0212.pdf

Can you post some pictures so we can see what you are working on?
 
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Old 01-21-13, 11:03 AM
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I will upload some later tonight when I get home from work. Weird this morning was it seemed to be working all right. see what happens when I get home
 
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