York S1-025-38252-000 Thermostat

The York S1-025-38252-000 Heat Only Thermostat is a high-precision OEM replacement component engineered for reliable temperature regulation in residential heating systems and commercial applications. Designed specifically as a 2-wire thermostat, this non-programmable unit serves as a direct replacement for legacy models including 025-35368-000, 7670-375, and 7975-375P. Optimized for Coleman furnaces and York-brand equipment, the low voltage thermostat provides consistent millivolt or 24V control to ensure accurate furnace cycling without the complexity of modern multi-stage interfaces. Its robust construction is ideal for rugged environments where simplified HVAC controls are required to maintain a set point in heating-exclusive configurations. For technicians servicing mobile home furnaces or standard gas-fired units, this manual thermostat offers a streamlined installation footprint and a durable interface that eliminates frequent recalibration. By ensuring a tight differential, the S1-025-38252-000 improves fuel efficiency and system longevity in all compatible single-stage heating environments.

Key Benefits:

• Universal Coleman Compatibility: Engineered to integrate seamlessly with all Coleman furnaces utilizing a 2-wire setup, even in units equipped with auxiliary A/C.
• Direct OEM Replacement: replaces multiple part numbers such as 3400-3851 and 7700-375P, ensuring a precise fit without field modifications.
• Simplified 2-Wire Installation: Designed with standard R and W terminals for rapid field wiring, reducing labor time during service calls.
• Durable Mechanical Design: Non-programmable interface provides reliable operation in both residential and light industrial heating applications.
• Enhanced Temp Regulation: Maintains a consistent thermal environment by providing stable signal communication to the furnace control board.

Common Questions:

Is this thermostat compatible with 24V and millivolt systems?
Yes, the York S1-025-38252-000 is designed to handle the 2-wire configurations typically found in 24V heating systems and specific millivolt applications, making it a versatile choice for older furnace models.

Can I use this for a system that also has air conditioning?
This is a heat-only thermostat. While it can be installed on units that have A/C components, it only provides terminals for heating control (R and W). It will not operate a cooling compressor.

Do I need to pull a "C" wire for this unit?
No, as a standard mechanical or battery-operated 2-wire unit, a common wire is not required for operation, making it ideal for retrofitting older homes with limited wiring.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.