Lennox 42J07 Limit Switch and other major brands

and other major brands

How can I tell if my reversing valve solenoid has failed

it does not require a C-wire for basic functionality

This allows for fine-tuning temperature swings to match the specific thermal characteristics of various furnace types

Lennox 42J07 Limit Switch and other major brandsAs an HVAC technician, you know that a reliable Lennox 42J07 Limit Switch is non negotiable for system safety and performance. This genuine OEM replacement part is an auto reset limit switch engineered to monitor internal plenum temperatures in a variety of Lennox residential and commercial units. Specifically designed as an L220 40F limit switch, it features a fixed temperature setting that triggers the circuit at a high limit of 220F and resets once