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Ships within 48 hours · Estimated delivery Aug 23 - Aug 28
the H19AA-4 is a direct drop-in replacement for the BASO H19AA-4C
Designed with sweat connections for secure brazing and a hermetic seal to prevent refrigerant loss
For contractors troubleshooting frequent furnace cycling or "limit open" fault codes
updated replacement for the now-obsolete 9003407105 and 9003407005 versions
York S1-024-36027-000 Limit Switch 321894-706 the H19AA-4 is a directThe York S1 024 36027 000 Limit Switch is a critical high temperature safety control designed for precise thermal management within HVAC furnaces and electric heaters. This genuine OEM replacement part is engineered to open the electrical circuit when the internal plenum temperature reaches its 160 degree Fahrenheit cutout point, effectively preventing heat exchanger damage or unsafe operating conditions. Once the system cools to the 50 degree
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