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Old 02-08-2011, 12:59 AM   #1
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American standard gas furnace

We cleaned the heat sensor on our furnace and when we put the doors back on it doesn't look right to me. Shouldn't the door that has the peephole show the red light? It is flashing slow but when I turn on the furnace it starts flashing faster. Is that ok?

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Old 02-08-2011, 01:44 AM   #2
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American standard gas furnace

if its a steady pulse you should be fine

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