Lennox 91J88 Control Board 320788-704 87-inch shaft diameter and a

87-inch shaft diameter and a 2

the T6 Pro is rated for 3H/2C heat pump systems

Why is the external equalizer necessary on an 11-ton valve

The inverted flare connection and durable bracket design allow for drop-in replacement in compatible furnaces and boilers

Helps maintain stable microfarad (MFD) ratings to ensure consistent compressor performance

Lennox 91J88 Control Board 320788-704 87-inch shaft diameter and 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