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Old 12-09-2009, 09:58 PM   #1
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American Standard Furnace-2 flash

Furnace runs fine for hours then only blows cold air. The burners light, then go out after 2 seconds. After several attempts to light, the 2 flash starts & the blower keeps going. Only way to get it to stop is to turn off at the switch. After it is off overnight, in the morning it will start & operate normally for many hours, then the same problem.

Vents are not blocked, filter is clean, I increased the intake by about 60% this summer by adding duct & vents.

HVAC tech will not come out unless it is in error mode, but with night temps at 8 degrees, I'll freeze if I keep it blowing.

Any suggestions? Simple parts to replace?

American Standard Furnace, 4 years old, Freedom 80, Comfort R, 2 stage


Last edited by flocke; 12-09-2009 at 09:59 PM. Reason: sp
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Old 12-09-2009, 11:11 PM   #2
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Clean your flame sensor.


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Old 12-10-2009, 09:16 AM   #3
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2 flash error-Houston204

Houston , we have lift off! Thank you, it's nice & warm, furnace hasn't shut off since last night & it's zero outside! Thank you!
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2 flash , american furnace , error codes

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