Durable Construction: High-grade steel design resists the corrosive effects of combustion by-products and high-temperature operation

The most common causes for this switch to open are restricted airflow

Common indicators include a "bulged" or swollen top at the terminals

Reliable Lever Action: Optimized length and geometry provide the necessary mechanical advantage for positive valve closure

the strainer body

Berko 410171001 Relay Durable Construction: High-grade steel designThe Berko 410171001 Relay is a specialized 24V time delay relay engineered for precise sequencing in commercial and industrial heating systems. As an essential Marley Engineered Products replacement part, this component is designed to manage the staggered activation of heating elements, preventing high inrush current and reducing stress on your electrical distribution panel. This HVAC control relay is a direct OEM fit for Berko CUH900 series heaters