York S1-THEC11NY Thermostat

The York S1-THEC11NY Thermostat is a professional-grade, 1H/1C non-programmable thermostat engineered for contractors who prioritize reliability and straightforward operation in the field. This unit is a versatile solution for single-stage heating and cooling systems, featuring a wide range of compatibility including gas electric, heat pumps (without auxiliary heat), and hydronic heating applications. Designed with separate RC and RH terminals, it allows for seamless dual transformer retrofits, making it a go-to choice for older system upgrades. The large LCD provides high-contrast visibility for both room and set temperatures, ensuring an intuitive interface for the end-user. For the technician, the battery or 24VAC system power options offer flexible installation, while the 2, 3, 4, or 5-wire compatibility covers most standard low voltage HVAC configurations. Built to maintain setpoints during power failures, this manual changeover thermostat ensures stable performance and accurate temperature regulation without the risk of logic loss. It is a rugged, OEM York replacement part that simplifies service calls and eliminates the complexity of programmable scheduling.

• Universal Compatibility: Works with 24VAC, DC, and millivolt systems, covering gas, oil, electric, and heat pump (1H/1C) equipment.
• Flexible Powering: Can be hardwired or battery operated with a front-loading compartment for quick maintenance.
• Installer Friendly: Features separate RC and RH terminals to accommodate systems with independent heating and cooling transformers.
• Set retention: Internal memory ensures that user-defined setpoints are never lost during a localized power outage.
• Simplified Interface: Easy-to-read digital display with clear Heat/Off/Cool and Fan On/Auto physical switches.

• Does the York S1-THEC11NY support auxiliary heat? No, this is a dedicated 1-stage heat / 1-stage cool thermostat and does not have terminals for controlling auxiliary or emergency heat stages.
• Is a C-wire required for installation? While a common wire is recommended for system power, this unit can operate strictly on AA batteries if a C-wire is not present at the wall.
• Can this thermostat be used with millivolt floor heaters? Yes, the S1-THEC11NY is compatible with millivolt systems, making it suitable for older wall or floor furnaces.

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.