Reznor 123976 Fan Control 30067439-890 this heavy-duty switch is a

this heavy-duty switch is a direct OEM replacement part designed to protect the compressor from catastrophic failure due to excessive head pressure

it acts as a permanent access port for gauge manifolds while providing a reliable shut-off mechanism for compressor isolation

Precise Adjustability: Field-adjustable set points from

As a critical component for maintaining proper static pressure and airflow

Reznor 123976 Fan Control 30067439-890 this heavy-duty switch is aThe Reznor 123976 Fan Control is a critical OEM replacement component engineered for precise thermal management in industrial and commercial heating applications. This F135 40F thermostatic switch is designed to regulate blower fan cycling by monitoring heat exchanger temperatures, ensuring the fan only operates within the 135F to 40F range. By maintaining these specific operational thresholds, the Reznor 123976 prevents the delivery of cold air