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When i first turn on my furnace the light is solid red then the burners kick on then after two or three minutes it shuts back off and then on the board the led light flashes three times

I check hoses they are fine took off flame sensor cleaned it it was fine is it possible its a bad pressure switch

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  • John White
    John White Oct 23, 2015

    I've found this video blog addressed this problem (which is exactly what my gas furnace was doing):http://gasfurnacepressureswitch.blogspot...

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  • Heating & Co... Master
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3 blinks can show pressure switch take of hose and clean out presseure switch with A drill bit sometimes this works , some times this blocks and this may help.

Posted on Dec 13, 2012

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gear001
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SOURCE: Goodman GMNT 60 Furnace. Burners shut off after a

No, the board isnt out. The board has a code telling you that its out. Its your flame sensor. You wouldn't have gotten any heat if the gas valve was out. check if that flame sensor goes to another sensor on the same circuit , if it does check that. If it just a one wire sensor make sure its in the right position. If its a one rod flame senor with one wire I would sand it down with sandpaper. if its a two wire senor ohm it out to see if you ger current going through it.


www.fastacservice.com

Posted on Oct 16, 2009

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