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Amana furnace- flame sensor keeps failing about once monthly

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Hey folks, I’ve been working on Amana AMH80803BNBB furnace for the past 3 or 4 months. The furnace is from 2016. Starting this winter, about once a month we’ve been having flame sensor failure issues. We’ve cleaned the sensor, replaced it with an oem and tried a different manufacturers flame sensor. Replaced the control board as well. When the sensors fail they are testing at 0ua. When a new sensor is installed it tests around 3ua. There is not excessive dust/dirt or detergents near the furnace. Any ideas? Thanks

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