Trane MOD1803 Control Processor 321702-401 we recommend selecting the TR6

we recommend selecting the TR6 model specifically calibrated for lower tonnage

a capacitor with a higher voltage rating (440V) can safely replace a 370V unit as long as the capacitance (45/4 MFD) and physical dimensions match

this Marley unit heater thermostat is rated for use with 120V

By utilizing precision-engineered Honeywell pneumatic parts

Trane MOD1803 Control Processor 321702-401 we recommend selecting the TR6The Trane MOD1803 Control Processor serves as the primary Unitary Control Processor for managing HVAC system communication within specific unit ventilators and split systems. This OEM Trane replacement part is engineered for precise PID loop control, ensuring the microprocessor accurately regulates heating and cooling stagings while maintaining optimal discharge air temperatures. As a critical HVAC circuit board, the MOD1803 monitors sensor inputs and