Quote:
Originally Posted by Hugh.vines@att.net
If your furnace only runs for a few minutes then flips off automatically, the flame sensor might be faulty. The flame sensor is responsible for monitoring the gas burner. If the furnace starts then shuts off instantly it may be because the flame sensor is not able to identify the flame and the control board will shut off voltage to the gas valve interrupting the heat cycle. The problem can be solved by merely cleaning the flame sensor, but if the issue persists, you may have to get the flame sensor replaced. You can use a soft abrasive pad to clean the flame sensor.
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Could also be the "sail switch".
Without info from the control board ???
jbwilli1
The led is on the bottom back corner of "your" board.
Might be hard to see, wait till dark to do a reset and start. After it fails look for a solid on off or blinking led.
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