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-   -   control board? (http://www.diychatroom.com/f17/control-board-64546/)

dub2dub 02-15-2010 05:34 PM

control board?
 
Trying to figure out if the control board is bad. inducer fan and blower fan run all the time even when i disconnect t wires at board even if i pull the plug harness with wires that go to gas valve,inducer switch and limits.Sounds like a bad board everything else checks out oh my voltage at the w on t stat is only 17v all others are 24?

brandonmcginnis 02-15-2010 07:09 PM

Is it a ComfortMaker furnace? Many furnaces will energize the blower and inducer motors if you have an open limit. Check for continuity through all the limits before you pull the board.


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