OEM Lennox Transformer — 46W10

The genuine OEM Lennox 46W10 transformer converts incoming line voltage into the low-voltage control power your Lennox system depends on. It energizes the 24V circuit that operates the thermostat, control board, sequencers, relays, and contactor coils, ensuring each component receives clean, correctly rated power. Because it is factory-matched to Lennox specifications, the 46W10 delivers the exact primary/secondary voltage and VA capacity your equipment requires.

When this transformer fails, the entire control side goes quiet. Look for a blank or unresponsive thermostat, no response to heating or cooling calls, contactors that won't engage, low-voltage fuses that blow repeatedly, or a transformer that hums loudly, runs hot, or shows scorch marks. These are signs of shorted or overloaded windings that require replacement.

OEM is the right choice for Lennox control circuits. A generic transformer with the wrong VA rating or loose tolerance can under-power coils and create intermittent faults that are difficult to trace. The Lennox 46W10 is built and bench-tested to precise specifications, protecting downstream boards and relays while keeping your system within warranty. In stock and ready to ship same day before 3PM CST.