For contractors handling service calls on legacy ECR equipment

This igniter requires a standard 7/8-inch wrench or socket for proper installation and removal

whether they are probe-type or float-operated

The single moving part—a hardened stainless steel disc—ensures minimal maintenance overhead

For contractors managing preventative maintenance schedules

Resideo THX9421R5021WW Thermostat 323613-751 For contractors handling service callsThe Resideo THX9421R5021WW is a high performance Prestige IAQ 2 Wire Thermostat engineered for technicians managing complex residential or light commercial HVAC systems. This high definition color touchscreen thermostat utilizes RedLINK wireless technology to provide comprehensive control over temperature and indoor air quality through a simplified 2 wire connection. When integrated with a Honeywell THM5421R1021 equipment interface module, it manages