Resideo THM5421R1021 Module 321894-708 specifically the MSZ-GE06NA through MSZ-GE18NA

specifically the MSZ-GE06NA through MSZ-GE18NA and MSZ-GL06NA through MSZ-GL24NA series

Check for carbon buildup on the rod or cracks in the porcelain insulator

Common Questions How do I handle unused pilot connections

technician-friendly installation

it can support both motor types

Resideo THM5421R1021 Module 321894-708 specifically the MSZ-GE06NA through MSZ-GE18NAThe Resideo THM5421R1021 Module is a professional grade RedLINK Equipment Interface Module (EIM) designed to streamline complex HVAC installations. As a centralized hub, this EIM allows technicians to manage high stage equipment and Indoor Air Quality (IAQ) accessories using only two wires at the thermostat location. It is fully compatible with Prestige IAQ and VisionPRO 8000 with RedLINK series thermostats, providing a robust solution for retrofits