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Originally Posted by jumpstart  I put in another limit switch. But now I can't get the ingition surface to ignite.
My hot ignition control when I turn on the furnace goes to the yellow for 2 secs, the solid green and I hear clicks, then it locks out.
When I turn on the furnace, I have the t stat on above the actual temp in house. The inducer goes on like it should first, the blower will only go on (of course) if I have that on ON instead of Auto. Well, that would be because it does not ignite.
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You say nothing about the HSI glowing. If no glow,the click you hear may be coming from ignitoin module sending pulse to send current to HSI. If you do not see it glow, test HSI leads when disconnected, for ohms (preferably under 100, usually about 28 on up) and to see if current is in the 2 wires that come from ignition board or module, to the HSI. If you have no jack to separate for the HSI, then maybe they are plugged directly onto board or module, and you can test there.
IF the HSI DOES glow, still do the ohms test on it in case it is weak.