Lennox 14D89 Fan Switch 319825-402 Its 4-13/16" x 8" mounting

Its 4-13/16" x 8" mounting footprint and sweat connections are designed for straightforward integration into existing liquid and suction lines

the Carrier 329117-703 is a mechanical airflow component and functions regardless of the fuel kit installed on the furnace

Proper calibration of this gas safety switch ensures optimal fuel-to-air ratios and prevents equipment damage during low-pressure events

The Carrier HK02ZA275 Pressure Switch is the OEM replacement part engineered specifically for high-demand Carrier

This 30-cubic-inch unit features a 3/8" sweat (ODF) solid copper connection

Lennox 14D89 Fan Switch 319825-402 Its 4-13/16" x 8" mountingMaintain consistent head pressure and prevent evaporator icing with the Lennox 14D89 Fan Switch, a critical component for low ambient cooling operations. This genuine OEM Lennox replacement part is engineered to cycle the outdoor fan based on system pressure, ensuring the compressor operates safely even when outdoor temperatures drop as low as 0F. Operating on a 208 230V 60Hz electrical configuration, the 14D89 provides the precise switching required