Source1 2538737000 Limit Switch Thermostat Opens 160F Closes 140F Auto Reset

Product Description

The SOURCE1 2538737000 is a limit switch and thermostat designed as a safety control device for residential and light commercial HVAC systems. It monitors supply air or heat exchanger temperatures and automatically shuts down the heating unit when temperatures rise beyond a safe threshold. This protects the furnace, heat exchanger, and connected components from heat-related damage. When conditions return to a safe range, the switch resets on its own without any manual intervention, which reduces service calls and system downtime. The 2538737000 opens at 160 degrees Fahrenheit and closes at 140 degrees Fahrenheit, giving the system a 20-degree differential that prevents rapid cycling and ensures stable operation. HVAC technicians rely on limit switches like this one to maintain safe furnace operation in both gas and electric heating systems. This unit is a direct OEM replacement part manufactured under the SOURCE1 brand, which supplies genuine York-compatible components. It fits a range of popular units including the XYF90060BU3-AB, PS9D20N135UP11A, and XYF90060BN3-AB models, among others. Using an OEM-spec part ensures electrical compatibility, proper calibration, and a secure mounting fit. Field technicians, HVAC contractors, and facilities maintenance professionals will find this part straightforward to install during routine maintenance or emergency repairs. The compact profile and lightweight build make handling and placement easy in tight equipment cabinets. Keeping an OEM-calibrated limit switch in place is critical for warranty compliance and long-term system reliability. This is a dependable, code-compliant replacement for worn or failed high-limit controls in York and compatible furnace applications.

• Opens at 160 degrees Fahrenheit and closes at 140 degrees Fahrenheit with a 20-degree differential for stable operation
• Auto reset function restores system operation automatically once safe temperatures are reached, reducing manual service calls
• OEM-compatible design fits XYF90060BU3-AB, PS9D20N135UP11A, XYF90060BN3-AB, and additional York-compatible units

Product Highlights

The SOURCE1 2538737000 is a precision-calibrated, auto-reset limit switch and thermostat that protects HVAC furnaces from overheating. It is a direct OEM replacement built for accurate fit and long-term reliable performance in York-compatible heating systems.

Product Information

Standard Information

• Brand: SOURCE1
• Manufacturer Part Number: 2538737000

Technical Specifications

• Product Type: Limit Switch and Thermostat
• Opens Temperature: 160 degrees Fahrenheit
• Closes Temperature: 140 degrees Fahrenheit
• Reset Type: Auto Reset
• Length: 12.15 inches
• Width: 5.9 inches
• Height: 2.5 inches
• Weight: 0.08 pounds