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Hello, one minute while I get some information together.
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On the backside of the panel you should see an error code list to match up the flash patter do you see that?
OK that is on a lockout, try to shut the power off to the unit for 10 secs and start it back up see if the flame comes on for a bit or not.
OK you have a dirty flame sensor, clean that off with some fine sand paper and you should be good to go!
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OK then you either have a bad flame sensor or the board is defective and not seeing the flame sensor. If you have a meter you can check the sensor. Here is a video to assist in checking the flame sensor to determine if that is bad or the board is bad.