Lennox 67K19 Relay R-134A This technician-grade component serves as

This technician-grade component serves as the core electrical interface for Series FS4-3 and FS4-3T units

making it a premier hydronic heating pump for various piping configurations

including HWG and CB models (Sizes 250)

The integrated 5-foot capillary tube provides the necessary reach for optimal sensing bulb placement

supporting standard-duty inductive loads and resistive electric heat

Lennox 67K19 Relay R-134A This technician-grade component serves asThe Lennox 67K19 Relay (part number 67K1901) is an essential OEM replacement component engineered for high reliability switching in residential and commercial HVAC systems. This 120V relay is typically configured for SPDT (Single Pole Double Throw) or SPST (Single Pole Single Throw) operation, depending on the specific furnace or air handler wiring requirements. Operating at 50 60 Hz, it provides precise control over high voltage circuits for