Modine 5H0749330003 Relay Els PW 29614 This is a proprietary PTC

This is a proprietary PTC sensor

What are the signs of a failing harness assembly

The Field Controls 46487501 is a 10-inch GVD series gas vent damper designed for high-efficiency 24Vac atmospheric gas heating systems

visible cracks in the XLPE jacket

Modine 5H0749330003 Relay Els PW 29614 This is a proprietary PTCThe Modine 5H0749330003 Relay is a heavy duty, OEM spec electromagnetic switch engineered for 120V heating systems. This industrial unit heater relay serves as the primary interface between low power control signals and high power blower or burner circuits, ensuring seamless ignition and fan sequencing. As a genuine Modine replacement part, it is listed under cross reference R4222D1039, maintaining the precise electrical tolerances required for Modine