Resideo ZD18X8TZ Damper 321042-401 The thermostatic element is designed

The thermostatic element is designed to shut down the hot water flow almost instantly if the cold water supply is interrupted

shock-resistant steel shell finished with corrosion-resistant epoxy powder paint

What are the signs of a failing flow switch

Common factors include high moisture levels in the combustion air

Resideo ZD18X8TZ Damper 321042-401 The thermostatic element is designedThe Resideo ZD18X8TZ is a high performance 18x8 zone damper designed for precision airflow control in residential and commercial forced air zoning systems. This parallel blade damper features a power closed spring return open configuration, ensuring fail safe operation to the open position during power loss or system interruptions. Engineered for seamless integration with Honeywell Home zoning panels, the unit utilizes a robust 24VAC synchronous motor