Out of 4 zones only one Zone is not working (Baseboard Hot Water Heater)

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Old 01-02-16, 08:51 AM
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Out of 4 zones only one Zone is not working (Baseboard Hot Water Heater)

I have baseboard hot water system and all other zone are working but only one zone is not working and I am not sure what to do.

I have tried below:

1) Made sure Thermostat is working correctly.
2) Opened Zone Valve Manually

Still not heat and Hot water is no circulating in only one zone. If I touch copper pipe next to zone valve, it is very hot.

Please Please Help
 
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Old 01-02-16, 09:22 AM
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Whats the make and model of the boiler?

Whats the pressure and temp gauge read on the boiler?

What type of heat emitters in the home?

what model zone valves...?

Possibly air but let us know the above first..

Pics always help...
 
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Old 01-02-16, 09:57 AM
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Zone Valve:
Brand: ERIE
Part # 0765C0008GA01

Boiler:
Brand: Weil-McLain
Model: VHE-6
Type: Natural Gas
INPUT BTU/hr: 167,000

Current Water pressure on Gauge: 20 PSI


What type of heat emitters in the home?
Not sure what you mean. But I think answer is Baseboard Water Heater. I have multiple zone system in house.

Apparently only this zone seems to be causing issue over and over. Last years I has same issue with same zone and after trying couple of thing it worked not sure what worked though.

I have removed water out of zone to let air out, let see if that works.

I have couple of questions regarding to this matter:
1) Do I have to open Manual Valve during purging the system ? Seems I do not since zone valve is below Drain Valve.
2) Could it be Zone Valve ? If yes, Can I replace Zone valve only without Un-Soldering the pipe, it seems Zone Valve is soldered with copper pipe but not sure if only top part can be replaced ? Do I have to replace with exact same or any newer and better zone valve I can replace with ?
3) If Air is the issue, why specific zone is having this issue over and over ? Is there anything else I can look at to get rid of this issue coming back ?Name:  Purge Air From Zone.jpg
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Old 01-02-16, 11:19 AM
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Does the boiler fire when just that zone is calling?you should be able to put that valve in manual and get heat when the circulator is running
 
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Old 01-02-16, 12:16 PM
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Boiler do not seem to fire when particular problematic zonevalve is opened. For rest of the valve it does fire. I have opened it manually and left it open for quite long time and still no heat or firing boiler
 
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Old 01-03-16, 08:34 AM
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I was able to fix it by draining water out of problematic zone second time. Some reason first time did not work. Second time, I left zone valve closed while draining water out of zone and it worked. There was lots of Air in the water causing this error.

Thank you everyone for your help. I could not have done without you.
 
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