York S1-2845-3171 95-105F AUTO Limit Switch

Description

York S1-2845-3171 AUTO Limit Switch Overview

The York S1-2845-3171 is an OEM automatic-reset limit switch designed to protect furnaces and heating systems from unsafe operating temperatures. With a trip range of 95–105°F, this limit switch monitors heat exchanger or plenum temperatures and interrupts the burner or heating circuit when temperatures exceed the set threshold — then automatically resets once conditions return to normal.

Key Features

• AUTO (automatic) reset operation — restores normal function once temperature drops back within range
• Trip range: 95–105°F for precise overheat protection
• Direct OEM replacement for compatible York heating systems
• Helps prevent heat exchanger damage, component failure, and unsafe operating conditions
• Reliable safety control for residential and light commercial furnace applications

Application

This limit switch is a genuine York replacement part engineered to maintain compatibility and performance in York furnaces and air handlers. It serves as a critical safety device, shutting down the heating system when temperatures rise beyond the rated threshold and automatically restoring operation after the system cools — minimizing nuisance service calls while keeping equipment protected.

Specifications

• Brand: York
• Part Number: S1-2845-3171
• Reset Type: AUTO (Automatic)
• Temperature Range: 95–105°F
• Application: Furnace / Heating System Limit Control