Lennox 18Y93 Relay Kit 30067439-890 this board is specifically engineered

this board is specifically engineered for two-stage hybrid and high-efficiency models

High-Durability Metallurgy: Stainless steel ball and stem prevent premature wear and chemical degradation compared to chrome-plated alternatives

as the artificial heat will skew the readings and degrade system performance

How do I test if the flame sensor is faulty

Lennox 18Y93 Relay Kit 30067439-890 this board is specifically engineeredThe Lennox 18Y93 Delay Relay Kit is a critical OEM component designed to regulate blower motor timing and facilitate efficient sequence operations in commercial HVAC equipment. As a primary delay relay kit, the 18Y93 provides a fixed 45 second blower on delay and a 150 second blower off delay, ensuring the heat exchanger is adequately warmed before airflow begins and residual heat is fully utilized post cycle. This HVAC time delay relay is the factory