When you're dealing with a Trane SWT1263 Limit Switch that has failed

meaning it requires power to both open and close the damper

as well as R-22 and various HFC/HFO replacements used in industrial refrigeration

Durable Construction: Engineered to resist diaphragm fatigue and electrical contact pitting for long-term cycling

though high-humidity environments or systems with significant particulate accumulation may require more frequent changes to maintain flow integrity

Lennox 12J41 TXV R-407A When you're dealing with aFor veteran technicians looking to restore factory spec refrigerant metering, the Lennox 12J41 TXV (also identified as model 103366 13) is the precise OEM solution for R 410A systems. This thermostatic expansion valve is engineered for 3 ton (and some 3. 5 ton) outdoor units, featuring a 3 8" ODM inlet and a 1 2" ODF outlet. Unlike standard non bleed valves, this unit includes a 5% bleed port, which assists in pressure equalization during the off