the magnetic relay design and enclosed housing allow it to operate efficiently in any mounting position within the appliance or junction box

the 664272R features a durable brass body and high-grade sensing bulb for rapid response to temperature fluctuations

the 200 PSI at 400°F rating allows for use in various saturated steam environments

while the ball bearing system ensures smooth mechanical operation under continuous load

this power assembly provides the mechanical feedback necessary for consistent evaporator superheat regulation

Weil McLain 510-312-091 Hi-Low Limit R-410A the magnetic relay design andThe Weil McLain 510 312 091 Hi Low Limit is a specialized hydronic control engineered for precise water temperature regulation in residential and commercial boiler systems. Designed for field proven reliability, this aquastat limit control manages the high limit (to prevent system overheating) and the low limit (to maintain base water temperature), crucial for boilers equipped with tankless coils. This W M OEM part features a 120 VAC power rating with