Most issues stem from venturi burner clogging

This OEM part arrives factory-balanced to meet manufacturer airflow specs

This precision-balanced centrifugal blower wheel is essential for maintaining the correct air-to-fuel ratio and ensuring the efficient evacuation of combustion gases

For multi-level applications

Lennox 97H31 Expansion Valve Els PW 29614 Most issues stem from venturiThe Lennox 97H31 Expansion Valve is a 3 ton, R 410A compatible thermostatic expansion valve (TXV) engineered for precision refrigerant metering in high efficiency cooling systems. This HVAC expansion valve replacement is essential for maintaining the correct superheat and ensuring the evaporator coil operates at peak thermal efficiency. Designed for compatibility with various Lennox residential air handlers and heat pump evaporators, the 97H31 TXV