the F29-0193 utilizes a ring base design that allows for installation over existing thermostats without needing to disconnect wiring

ensuring the system operates at peak airflow efficiency

while bright yellow signals a wet condition

The "40" side is dedicated to the compressor (Hermetic)

Is this fitting compatible with both soft and hard copper tubing

Robertshaw 41-401 Hot Surface Ignitor the F29-0193 utilizes a ringFor service calls requiring a robust ignition source, the Robertshaw 41 401 Hot Surface Ignitor is the industry standard silicon carbide solution. Engineered for 120V AC operation, this Carbide Series ignitor features high purity recrystallized silicon carbide construction, often referred to as Crystar, which provides the thermal stability needed for high cycle heating applications. This 271A factory spec component is a direct cross reference for