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    hesitating oil furnace (5 Posts)

  • Michy Michy December 1, 2010 @ 1:01 PM
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    hesitating oil furnace

    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
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  • billtwocase billtwocase December 1, 2010 @ 1:12 PM
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    it's either

    a Taco zone valve head, or a cad cell relay. Could be the aquastat, but unlikely.
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  • add add December 1, 2010 @ 10:21 PM
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    sounds like a

    bad primary control.
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  • Patchogue Phil Patchogue Phil December 2, 2010 @ 12:09 PM
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    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.
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  • billtwocase billtwocase December 2, 2010 @ 7:56 PM
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    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
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