This model provides positive dead-end lockup

is not interchangeable with Mark IV or MicroTech II legacy boards due to different terminal layouts and communication protocols

Dual Rotation: Field-reversible CW/CCW rotation allows for compatibility across multiple unit configurations

making it ideal for high-output commercial and industrial hydronic heating systems

Optimized System Logic: Restores factory-calibrated timing for compressor delay and fan relay operations

Resideo THP9045A1023 Wire Saver 322027-701 This model provides positive dead-endThe Resideo THP9045A1023 Wire Saver is a specialized C wire adapter designed for 1 heat 1 cool retrofit applications where the existing thermostat cable lacks a dedicated 24V common wire. By utilizing the K terminal on compatible Honeywell Home thermostats, including the RedLINK 8000 series and THX9000 Series, this module effectively splits the signal at the air handler or furnace. This allows a single conductor to manage both fan and compressor relay