Properly sized orifices like the 661042R are essential for maintaining the rated BTU output of the burner assembly

The "3CH" designation indicates a Hood #3

Engineered for compatibility with specific Goodman and Amana gas furnaces

chemically resistant material designed for dimensional stability under repeated heating cycles

Lennox 44L72 Limit Switch Properly sized orifices like theThe Lennox 44L72 is a high precision 100 145F Auto Limit Switch engineered for critical temperature regulation in commercial and residential furnaces. As a veteran technician knows, the secondary limit must respond instantly to airflow restrictions or over temperature conditions to prevent heat exchanger damage. This Lennox blower limit switch features an automatic reset, opening the circuit when the temperature exceeds 145 degrees Fahrenheit and