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First floor calls for heat boiler (short cycle) banging pipes

jogrady
jogrady Member Posts: 5
in THE MAIN WALL
I changed the thermostat and replaced expansion tank which was full of water. The two other zones work fine. Could it be the zone valve is bad and causing this problem

Comments

  • Jamie Hall
    Jamie Hall Member Posts: 25,731
    It could. Could be a few other things, too...
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • JUGHNE
    JUGHNE Member Posts: 11,362
    Would you have a Honeywell zone valve installed backwards?
  • HVACNUT
    HVACNUT Member Posts: 6,641
    You replaced the thermostat and extrol to remedy the problem? Sounds like it's air bound. How's the air eliminator(s)?
  • JUGHNE
    JUGHNE Member Posts: 11,362
    Is the zone valve opening? Some have manual over ride.
    Return valve closed or flow/check not opening?

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