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If the switch stays open despite normal airflow
What units does this harness typically fit
Smith boiler and water heater assemblies
this is a direct mount control designed to thread directly onto the system fitting
Lennox 59W21 TXV Els PW 29614 If the switch stays openThe Lennox 59W21 Thermal Expansion Valve (TXV) is a critical 8 ton metering device engineered for precision refrigerant control in high capacity commercial HVAC systems. Designed with 3 8" x 1 2" ODF sweat connections, this valve ensures accurate superheat maintenance across varying load conditions, preventing liquid floodback and protecting the compressor. The 59W21 features a 30 inch capillary tube and is officially rated as the direct replacement
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