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Old 10-25-2009, 08:29 AM   #1
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York 650.77-N2U flame was lost 5 times


Hi:

Just noticed that my furnace tries to start and fails. Ignitor starts, gas value opens and flame ignites, it stays on for 4-5 seconds then the gas shuts off. The furnace tries 5 times. Furnace is a mid efficentcy gas two stage.

The error code is "8 FLASH" flame is lost 5 times during a heat cycle. Could be caused by low gas pressure or faulty gas value.

I'm pretty sure that the gas pressure is fine, I would like to clean the gas value if possible or applicable.

Less then a year ago I had to get a professional to replace the pressure switch because it wasn't closing correctly and then cost a few bucks and I don't really want to do this again.

Thanks!

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Old 10-25-2009, 09:35 AM   #2
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York 650.77-N2U flame was lost 5 times


Clean the flame sensor. Sits in front of one of the burners and should look like one of these, use fine emory paper or clean steel wool:
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