making it ideal for checking HVAC duct temperature drops and air handler performance in real-time

Featuring a 64

The York S1-024-35664-000 Relay is a heavy-duty 30A HVAC switching relay engineered for reliable performance in residential and commercial climate systems

Frequent trips typically indicate a clogged heat exchanger

Lennox 56L68 Relay Els PW 17895 making it ideal for checkingThe Lennox 56L68 is a heavy duty K20 blower relay engineered for precise airflow management in residential and commercial HVAC systems. This 24V SPDT relay (Single Pole Double Throw) provides reliable switching for blower motors, allowing a low voltage control signal to efficiently manage high power line circuits. It is functionally identical to the Lennox 56L6801 and serves as a direct OEM replacement part for aging or sticking furnace relays in