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    insideman's Avatar
    insideman Posts: 2, Reputation: 1
    New Member
     
    #1

    Oct 24, 2008, 04:13 PM
    NO Heat in One Zone of Multiple Zone System
    The heat in our four zone house is working except for one zone. Digital Honeywell THermostat lights up when programmed, little flame picture appears and click noise is heard, just like other thermostats, but no heat in that zone. Any ideas what is wrong or how to fix. Thanks
    mygirlsdad77's Avatar
    mygirlsdad77 Posts: 5,713, Reputation: 339
    Plumbing Expert
     
    #2

    Oct 24, 2008, 05:23 PM

    Forced air or boiler system?
    insideman's Avatar
    insideman Posts: 2, Reputation: 1
    New Member
     
    #3

    Oct 24, 2008, 07:57 PM
    Boiler system
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
     
    #4

    Oct 24, 2008, 11:26 PM
    Could be
    Air in the line.
    Defective zone valve or power head.
    Low water pressure in system
    Defective relay to activate pump

    Check out all of these then post back.
    mygirlsdad77's Avatar
    mygirlsdad77 Posts: 5,713, Reputation: 339
    Plumbing Expert
     
    #5

    Oct 25, 2008, 12:49 PM

    What type of zone valves do you have. Taco, Honeywell? There should be a lever on the zone valve that will allow you to manually open the valve. Turn a thermostat up in a portion of the house that is getting heat, then manually open the zone valve to the part of the house that isn't getting heat. Let me know what you find, and we will take it from there.
    LRoscoe's Avatar
    LRoscoe Posts: 1, Reputation: 1
    New Member
     
    #6

    Oct 21, 2010, 08:06 PM
    @mygirlsdad77
    I'm having the same problem as stated above, I have FHW gas w/ Taco, when I open the valve manually and turn up the other thermostat, I get heat all through, though I am hearing air in the system and trying to bleed it out. I can't get the second zone to work on it's own.
    mygirlsdad77's Avatar
    mygirlsdad77 Posts: 5,713, Reputation: 339
    Plumbing Expert
     
    #7

    Oct 22, 2010, 03:57 PM

    Sounds like you need replace the taco valve head assembly, and possibly the internals of the valve body, or just replace the complete zone vavle and you should be set.

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