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Issue with beckett oil furnace fan going on and off

Wayne1
Wayne1 Member Posts: 1
in Oil Heating

I changed air filter,cleaned sensor, burner seems to be fine and fan seems to run correctly while burner is on,it's afterwards it's on and off.

Comments

  • yellowdog
    yellowdog Member Posts: 204

    What model of furnace? What controls the fan? When's the last time it was vacuumed out?

  • Grallert
    Grallert Member Posts: 833

    How often does the fan come on after the burner is off? How long does this on/off/on/off last? The burner will only go off for three reasons. The heat exchanger reaches a high limit, the thermostat is satisfied or the burner locks out on a safety issue. Can you show a picture? I'm curious as to what kind of fan limit controls are present.

    Miss Hall's School service mechanic, greenhouse manager, teacher, dog walker and designated driver

  • HVACNUT
    HVACNUT Member Posts: 6,454

    If it's a fan/limit control, it's not uncommon for the fan to cycle a few times after the call for heat ends. The filter is clean, so the furnace is oversized, or incorrect ductwork, or dirty AC evaporator, or wrong blower speed.

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