Nordyne 104381000R Relay

The Emerson 1F95-1277 is a versatile Blue Series 12-inch touchscreen thermostat engineered for universal application in both residential and light commercial environments. This high-performance programmable digital thermostat is capable of managing up to 3 stages of heat and 2 stages of cool, including specialized support for multistage heat pump systems with auxiliary or emergency heat. Featuring a massive 12-square-inch backlit display, it provides intuitive touchscreen climate control with dual-power capability, allowing for hardwired 24V installation or purely battery-operated service for legacy systems such as 750mV millivolt floor or wall furnaces.

For advanced system management, the unit supports dual fuel heat pump control, eliminating the need for external fossil fuel kits when integrated with an outdoor remote sensor. Technicians can configure it for 7-day, 5+1+1 day, or non-programmable operation, ensuring maximum HVAC compatibility across gas, oil, electric, and hydronic 3-wire zoned systems. The built-in Cool Savings feature and programmable fan modes optimize energy efficiency during peak demand, while keypad lockout safeguards against unauthorized setpoint adjustments in high-traffic areas.

Key Benefits

• Universal System Compatibility: Seamlessly manages multistage heat pump (3H/2C) and conventional (2H/2C) systems.
• Dual Fuel Logic: Integrated software automatically switches between heat pump and fossil fuel heat without extra relays.
• Enhanced Service Reminders: Displays specific notifications for filter change and system maintenance to preserve equipment lifespan.
• Remote Sensing Capability: Supports an optional indoor or outdoor wired sensor for remote temperature monitoring and auxiliary lockout.
• Installer-Focused Design: Features easy-to-use terminal blocks (RC, RH, C, W/E, W2, Y, Y2, O/B, G, L, 6, +, S, -) for rapid field installation.

Common Questions

Ensure the 24VAC common wire is secured or replace the two AA batteries. If the issue persists, perform a hard reset by removing batteries and disconnecting power for two minutes, then check for a tripped circuit breaker or blown fuse at the air handler.

Yes, the 1F95-1277 is specifically designed to be compatible with 3-wire zoned hydronic systems, allowing for precise control of hot water heating zones.

While this is a hardwired 24V thermostat, it can operate on battery power alone. However, for continuous backlighting and optimal performance in heat pump applications, a common wire is highly recommended.

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.