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hesitating oil furnace

Michy Member Posts: 1
Our 22 year old Weil-McLain boiler just recently started hesitating. When it starts up it runs about 30 seconds and stops for about 2 seconds. Then it starts up again and runs normally. It never used to stop for 2 seconds. Do you know what the problem is? Thanks! Michele


  • billtwocase
    billtwocase Member Posts: 2,385
    it's either

    a Taco zone valve head, or a cad cell relay. Could be the aquastat, but unlikely.
  • add
    add Member Posts: 94
    sounds like a

    bad primary control.
  • Patchogue Phil_2
    Patchogue Phil_2 Member Posts: 304
    air in oil

    Perhaps air getting in between the nozzle and the pump,  during shutdown?  Then a brief moment w/o oil when it first fires up.
  • billtwocase
    billtwocase Member Posts: 2,385
    wasn't thinking that

    but could be starving for fuel. Enough of an air leak or restriction, it should lock-out at some point if flame failure is long enough. I'm thinking electrical, possibly a cad cell control with recycle feature that is going bad. Carlin control was good for doing just that
This discussion has been closed.