Harman Advance Error Code 6
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Not a Harman expert but a search came up with this .
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A Harman Advance Error Code 6 means the control board detected poor or incomplete combustion over a 25-minute period, often due to low exhaust temps, signaling a need for a deep cleaning, airflow obstruction (like a blocked vent, dirty combustion blower, or fines box), or an issue with the ESP probe/pressure sensor, or even the door not closing properly, but can also point to auger jams or low pellets. Start by checking the fines cleanout, ensuring the door is sealed, and thoroughly cleaning the firepot and vents, then inspect the combustion fan and ESP probe, as these are common culprits for airflow problems.
Not a Harman expert but a search came up with this .
Others will chime in
A Harman Advance Error Code 6 means the control board detected poor or incomplete combustion over a 25-minute period, often due to low exhaust temps, signaling a need for a deep cleaning, airflow obstruction (like a blocked vent, dirty combustion blower, or fines box), or an issue with the ESP probe/pressure sensor, or even the door not closing properly, but can also point to auger jams or low pellets. Start by checking the fines cleanout, ensuring the door is sealed, and thoroughly cleaning the firepot and vents, then inspect the combustion fan and ESP probe, as these are common culprits for airflow problems.
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