Question about Cross Furnace Draft Inducer Blower 115 Volts Fasco # A064

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My furnace wont come out of lock out mode

I have a Heil furnace and when it tries to come on within a second or two of trying to come on it goes into lock out mode. The computer board, limit and roll out switch have been replaced what is causing this problem

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  • carl carpenter
    carl carpenter May 11, 2010

    check to see if your pressure switch is working, should see a rubber tube coming from induced draft motor to the switch make sure opening at motor is clear

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Check your exhaust and your inducer
if your inducer cant not sence proper air flow
either positive or neg depending on your set up
it will shut down and lock out on safety

Posted on Oct 06, 2009

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Pressure swithc stuck closed? try undoing on of the wire going to the pressure switch and see if it stays on longer. Make sure you tested all limit switches there are usually at least 3 and up to 5

Posted on Jul 27, 2009

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Posted on Jan 02, 2017

Accurate Joe
  • 61 Answers

SOURCE: furnace burner ignites then goes out

Sound like a thermocouple, or flame sensor.
If it has flame sensor make sure you check micro amps to verify operation, because it might be the board that controls the sensor.

Posted on Dec 01, 2008

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