and direct-drive motors

this L150F-30 high limit switch prevents heat exchanger overheating

C) and clear of any metal cabinet parts to prevent shorting

RIB relays

Lennox 25G43 Time Delay Relay Els PW 17895 and direct-drive motorsThe Lennox 25G43 Time Delay Relay is a critical component for managing sequence of operation timing in residential and commercial HVAC units. Also identified by part number 25G4301, this 24V AC time delay relay is engineered to prevent short cycling and coordinate staged cooling demands. In modern Lennox HVAC systems, this specific relay on make and delay on break timer ensures independent component timing, allowing for precise control of fan circuits