the 21V51U-843 furnace kit includes a 120V nitride ignitor intended to replace the original 80V ignitor in those specific applications

the 900-106 delivers consistent readings to ensure safe and reliable unit operation

To ensure optimal signal strength and system reliability

Key Benefits Enhanced System Visibility: Allows for remote monitoring of combustion status and historical lockout data without opening the main control cabinet

These issues often lead to pressure switch failures due to restricted airflow or pressure drops

Trane VAL8801 TXV 318172-701 the 21V51U-843 furnace kit includesThe Trane VAL8801 is a high performance 5 ton thermostatic expansion valve engineered for precise refrigerant metering in R410A residential and commercial air handlers. This OEM expansion valve, also identified by part number D154636P07, features 3 8 x 1 2 ODS connections and is designed to maintain optimal superheat across varying load conditions. It serves as a direct replacement for Trane TXV kit components, ensuring the evaporator coil operates at