OEM Lennox Low Ambient Control w/ Outdoor Fan Lock — 14N31

The genuine OEM Lennox 14N31 is a low ambient control with an outdoor fan lockout that enables your air conditioning or heat pump system to operate safely in cold outdoor temperatures. It cycles the condenser fan based on refrigerant pressure or ambient temperature, maintaining sufficient head pressure so the system can continue to cool during low-ambient conditions such as economizer cooling or year-round server-room applications.

Common failure symptoms include the outdoor fan running continuously in cold weather, low refrigerant pressure faults, insufficient cooling on cool days, short cycling, or the compressor tripping on low-pressure lockout. A failed control may also leave the fan stuck off, causing high-pressure trips.

Choosing the OEM Lennox 14N31 guarantees the correct pressure setpoints, wiring terminals, and lockout logic engineered for your Lennox equipment. Aftermarket substitutes often use different cut-in/cut-out thresholds that can allow compressor damage or nuisance tripping. The factory part protects your compressor investment and restores reliable low-ambient performance for your Lennox system.