Question about Heating & Cooling
I check hoses they are fine took off flame sensor cleaned it it was fine is it possible its a bad pressure switch
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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Posted on Jan 02, 2017
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.
Posted on Oct 16, 2009
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