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Old 11-22-2010, 09:11 PM   #1
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American Standard Freedom 80 furnace

Diagnostic light is flashing five times indicating " flame sensed with gas valve off". Fan runs with no call for heat and stops only when power is disconnected. Blower comes on with fan, but never sequences to ignition (hot surface igniter), no flame ever comes on so why should it indicate this problem? Could this be a bad module?

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Old 11-22-2010, 11:27 PM   #2
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American Standard Freedom 80 furnace

Clean the flame sensor with steel wool or a scotch brite pad (do NOT use sand paper or even sand cloth).

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Old 11-23-2010, 04:21 AM   #3
An old Tradesmen
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American Standard Freedom 80 furnace

Was a new thermostat put on in the last year. if so, post brand an model number.

Was any electrical work done in your house in the last year.
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