OEM Lennox CXM Control Board — Y5970

The genuine OEM Lennox Y5970 CXM control board (factory reference S17B0001N01) is the primary logic and safety module that manages operation of your Lennox unit. It monitors sensor inputs, sequences compressor and fan operation, tracks fault conditions, and coordinates the safety lockouts that protect your equipment. Built to exact Lennox specifications, the Y5970 is a direct replacement that restores factory-rated control and diagnostics.

When a CXM board fails, common symptoms include the unit not starting, intermittent or short cycling, blinking fault or status LEDs, unresponsive thermostat calls, or a system that repeatedly locks out on a safety error. Heat, voltage surges, moisture, and aging electronic components are the usual causes of board failure.

Choosing an OEM Lennox board matters. The Y5970 is programmed with the correct firmware and pin-out for your system, ensuring proper communication with sensors, relays, and the thermostat. Generic or aftermarket boards can cause miscommunication, nuisance faults, or improper safety sequencing that risks further damage. Installing the exact factory part guarantees correct fit, full functionality, and preserves the reliability of your Lennox equipment.