Lennox 19J95 Control Kit 318172-701 What do the different colors

What do the different colors on the indicator signify

What is the difference between SEC99AA-18 and SEC99AA-18C

Featuring a 1 1/8" ODF sweat connection and a massive 75 cubic inch desiccant volume

or a two-position controller

This specific blower motor housing ensures the correct performance curves for systems requiring an 11-inch diameter by 10-inch width configuration

Lennox 19J95 Control Kit 318172-701 What do the different colorsThe Lennox 19J95 Control Kit is an OEM specified integrated ignition control replacement engineered specifically for SLP98 and SLP99 gas furnace series. As a veteran grade furnace circuit board replacement, this kit is the direct operational successor to legacy part numbers 15M50 and 102813 02. It serves as the primary furnace ignition control logic, managing the 120V ignitor firing sequence, flame rectification, and synchronous gas valve operation to