Issue with beckett oil furnace fan going on and off
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
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What model of furnace? What controls the fan? When's the last time it was vacuumed out?
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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
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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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