Resideo ZD16X18TZ Damper 321894-709 this 025-30891-000 HVAC part provides

this 025-30891-000 HVAC part provides the exact OEM fit and conductivity required to prevent intermittent power loss and ensure the safe operation of the primary power circuit

then thread the new operator onto the existing valve base

When diagnosing a cracked heat exchanger or assessing soot accumulation

Engineered with a durable porcelain bushing and a high-grade iron core construction

allowing for proper electrical routing to your unit's contactors and circuit breakers

Resideo ZD16X18TZ Damper 321894-709 this 025-30891-000 HVAC part providesThe Resideo ZD16X18TZ is a robust 16" Wide X 18" High parallel blade zone damper engineered for precision airflow control in residential and light commercial HVAC zoning applications. Built with a high grade extruded aluminum frame and blades, this unit is designed for long term durability and low leakage performance. The synchronous motor is a 24Vac power closed spring return open actuator, ensuring a fail safe normally open position during power