High-Temperature Durability: Silicon carbide construction handles repetitive thermal stress in high-efficiency gas furnace ignition cycles

After ensuring the unit is powered off

While designed specifically for Trane equipment

From there

this valve features an A-port equal percentage flow characteristic and a modified B-port for constant common port flow

Modine 5H0750290000 Transformer Els PW 17895 High-Temperature Durability: Silicon carbide constructionMaintain the electrical integrity of your unit heater with the Modine 5H0750290000 Transformer, a precision engineered 40VA control transformer designed for reliable stepped down power distribution. This OEM replacement part is the current direct substitute for the legacy Modine 5H75029, ensuring a perfect physical and electrical fit without field modifications. It operates with a 120V primary voltage and delivers a stable 24V secondary output,