reducing nuisance service calls

a reading significantly different from 15K ohms indicates the resistor is faulty and requires replacement

calibrated to open at 170°F and close at 140°F

Industrial-Grade Durability: Constructed from corrosion-resistant materials to ensure long-term stability in HVACR systems

and Carrier units using the TF5-830 voltage and phase configuration

Reznor 85449 Limit Switch reducing nuisance service callsThe Reznor 85449 is a critical safety component designed for precise thermal regulation in commercial gas fired unit heaters and furnaces. This 140 200F Auto Limit Switch monitors internal air temperatures, functioning as a primary high limit safety by interrupting the burner circuit if the heat exchanger surpasses the 200F threshold. As an OEM replacement part, it ensures seamless compatibility with Reznor UDAP, UDAS, and UDX series heaters,