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61K views · 417 reactions | In 25 years I've never seen or observed an issue cleaning a flame sensor with any type of sand or emery cloth. Some claim it will leave a layer of glass and reduce the signal. I would love to see a video of this phenomenon. #hvac #flamesensor #residentialhvac #hvaclife #hvacsystem #hvacbusinsess #hvacservice #hvaceducation #hvacknowledge #hvacinstall #hvacmaintenance #gasfired #furnace | HVAC Know It All | Facebook
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