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

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

For veteran technicians servicing industrial heating systems

the 26H78 ensures high-reliability performance in Lennox G25

42-42139-11

Berko 410171001 Relay Common indicators include a "bulged"The 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