The Trane THT3044 is a manual reset carbon monoxide limit switch rated at 200°F, designed to enhance safety in HVAC systems. It monitors temperature conditions associated with unsafe combustion or restricted airflow and interrupts system operation when excessive heat is detected. Once tripped, the switch requires manual reset to restore operation, ensuring issues are inspected before ... https://www.partshnc.com/200f-co-limit-switch-5