Lennox 74W76 Limit Switch 321042-401 Always verify the fan blade

Always verify the fan blade pitch before installation to ensure proper airflow direction across the coil

and 50/50 glycol solutions with a 11

Techs should note the 53-ohm coil resistance and verify the 24VDC system compatibility to prevent premature coil failure or overheating during extended operation cycles

while specific flash codes (if tied to a diagnostic module) might indicate a low voltage or secondary transformer issue

It is designed to replace the older version without any modification to the mounting or wiring

Lennox 74W76 Limit Switch 321042-401 Always verify the fan bladeThe Lennox 74W76 Limit Switch is a critical safety component designed for precise thermal regulation within residential and commercial Lennox HVAC systems. As a veteran grade furnace high limit switch, this OEM part is calibrated with a 200F cut out temperature to prevent heat exchanger damage and ensure safe operational cycles. This auto reset switch (Part #102135 11) is engineered for high demand environments, offering reliable continuity for