White-Rodgers 1E56N-444 Thermostat

The White-Rodgers 1E56N-444 is a professional-grade, non-programmable 24V thermostat designed for reliable control over single-stage heating and cooling systems. Engineered with a snap-action contact mechanism, this vertical model provides precise temperature regulation within a 50-90°F range. This unit is highly versatile, supporting 1H/1C configurations as well as heat-only or cool-only setups. It is specifically compatible with 750mV millivolt systems and 3-wire zone valves, making it a rugged solution for older equipment retrofits and specialized hydronic applications. The terminal layout includes RC, RH, W, Y, G, O, B, and A, allowing for seamless integration across various HVAC platforms. This mercury-free thermostat is a direct replacement for legacy models including the 1E56-444, 1E35-910, and 1C50-301. Its mechanical simplicity ensures long-term performance in demanding residential or light commercial environments where complex digital interfaces are not required.

Technical Specifications & Key Benefits:

• Universal Compatibility: Operates efficiently with single-stage gas, oil, or electric systems, including 24V HVAC controls and 750mV applications.
• Snap-Action Contacts: Provides positive, reliable switching without the need for leveling, ensuring consistent performance in high-traffic areas.
• Comprehensive Terminal Block: Features RC, RH, W, Y, G, O, B, and A terminals for maximum wiring flexibility on vertical setpoint thermostats.
• System Flexibility: Includes switches for Heat/Off/Cool and Fan Auto/On, with an integrated heat/cool wallplate for clean installations.
• Direct Replacement: Designed to drop in for White-Rodgers 1E56-301 and 1F36-910 legacy units, reducing labor time during service calls.

Common Contractor Questions:

How do I wire the 1E56N-444 for 3-wire zone valves?
The terminal 'A' is utilized specifically for these applications. Ensure the jumper is properly configured between RH and RC if using a single transformer system.

Is this unit compatible with heat pump systems?
This model facilitates O and B terminals for reversing valve control, making it suitable for single-stage heat pumps that do not require auxiliary heat staging.

Can this thermostat be used in millivolt fireplace applications?
Yes, the mechanical snap-action design is ideal for 750mV applications where low-voltage control power is generated by a thermopile.

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.