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One Zone Not Heating Oil Burner

hcrumley
hcrumley Member Posts: 1
in Oil Heating

Hi there,

We have a two zone oil burner with baseboard hot water heating. The bottom floor zone valve opens when you turn thermostat up and baseboards get warm but not hot. The boiler doesn’t kick on when you turn thermostat up. The pipe coming from the zone valve is definitely hot. We haven’t had freezing temps lately. We were having issues with lockouts and had someone coming clean and service. I’m wondering who to call next? Plumber or hvac?

Comments

  • 109A_5
    109A_5 Member Posts: 1,883

    Hello hcrumley,

    If one zone works normally and the other does not, assuming no wiring issues, the 'End Switch' inside the Zone Valve assembly may have failed or the zone valve is not fully opening.

    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System
  • SuperTech
    SuperTech Member Posts: 2,492

    It could be something like a zone valve or you might have air in the pipes and it's not circulating. Whoever takes care of the oil burner should be able to figure it out. Not all plumbers work on boilers and not all HVAC companies are good with oil burners. But usually whoever does oil burner service will know how to troubleshoot a boiler.

  • HVACNUT
    HVACNUT Member Posts: 6,442

    You would call whoever services the boiler.

    The upper level zone works fine?

    There could be air in the loop and it needs to be purged.

    Is the lower level on a slab, or is there basement or crawlspace underneath?

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