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Confirm your system voltage before installation to prevent electrical damage to the control board
Broad Cross-Reference: Directly replaces S1-7956A-3771
For technicians overseeing industrial or commercial maintenance
OEM Precision: Guaranteed compatibility with Heil
Technical Reliability: Features a high-quality Fasco 70581522 motor with permanent lubrication for extended service life in high-heat environments
Lennox 21L87 TXV R-22 Confirm your system voltage beforeMaintain precise system balance with the Lennox 21L87 TXV, a genuine OEM thermostatic expansion valve designed specifically for Lennox air conditioning and heat pump units. This valve is engineered to modulate refrigerant flow dynamically based on the cooling load, ensuring the evaporator operates at peak efficiency. By maintaining the optimal superheat at the evaporator outlet, the 21L87 prevents liquid slugging and protects the compressor from
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