Does this thermostat require a common wire (C-wire)

to maintain steady-state efficiency

Use a jumper across the Speedup pins on the board

6-ton capacity compressors

Its direct-fit configuration simplifies the swap-out process for field contractors

Trane CNT3159 Pressure Switch 319848-301 Does this thermostat require aThe Trane CNT3159 Pressure Switch is an essential high pressure cut out designed for precise refrigerant circuit monitoring in residential and light commercial HVAC units. This SPNO (Single Pole Normally Open) switch serves as a critical safety component, engineered to open the circuit when system pressure reaches 400 PSI and reset upon falling to 250 PSI. Built for compatibility with modern high pressure refrigerants like R 410A, the CNT3159 prevents