Lennox 91J88 Control Board 326058-757 How do I troubleshoot a

How do I troubleshoot a failure to ignite

ensuring that gas flow is only permitted when a stable flame is detected

Will this harness fix a 'No Spark' condition

supporting heating capacities up to 3

ensuring reliable opening and closing cycles under full load

Lennox 91J88 Control Board 326058-757 How do I troubleshoot aAs a seasoned technician, you know that a failing Lennox 91J88 Control Board is often the culprit behind intermittent ignition or irregular blower cycles. This ICM gas furnace control board is a high performance OEM replacement part designed to manage critical sequences, including ignitor warm up, gas valve timing, and inducer motor speed. Engineered for 120V and 24V applications, it integrates microprocessor based logic to ensure precise flame