The Uni-Kit design also includes an adapter for converting threaded 2CH thermocouples to 2C snap-in types

The non-PCB

50" NPT nipple allows for exterior mounting to any standard junction box

as using an incorrect replacement regulator spring can lead to pressure hunting or lock-up issues

Look for visible cracking

Lennox 42J03 Limit Switch The Uni-Kit design also includesThe Lennox 42J03 Limit Switch is a critical safety component designed for precise thermal regulation within residential and commercial HVAC systems. This genuine OEM replacement part, also identified as part number 42J0301, features a fixed temperature range of 150 190F with an automatic reset function. As a veteran grade furnace high limit switch, it monitors the plenum temperature and breaks the electrical circuit to the gas valve if overheating is