Robertshaw RS8110 Thermostat

The Robertshaw RS8110 is a high-performance non-programmable thermostat engineered for 1H/1C HVAC applications. Designed as a direct drop-in replacement for the Robertshaw RS2110 and the 8444 model, this unit streamlines field upgrades with its universal sub-base and large terminal blocks. Whether you are servicing a gas, oil, or electric furnace, the RS8110 offers versatile power options, operating via 24V AC hardwire with a common lead or AAA battery power for systems where a common wire is unavailable. The interface features a 4.6-square-inch blue backlit display, providing clear visibility in dimly lit mechanical rooms or residential hallways.

For technicians, the RS8110 includes essential configuration tools such as an adjustable temperature differential (swing) and room temperature calibration to optimize system cycle rates and energy efficiency. It is fully compatible with single-stage heat pump systems (without auxiliary heat) and includes separate O and B terminals for reversing valve control. Integrated compressor delay protection prevents short-cycling, protecting the HVAC system components during rapid power fluctuations. The front-load battery compartment allows for rapid maintenance without removing the thermostat from the sub-base, maintaining a low-profile aesthetic while delivering professional-grade reliability for any single-stage thermostat replacement.

• Direct Retrofit Compatibility: Serves as the official replacement for legacy RS2110 and 8444 models, ensuring a seamless fit on existing footprints.
• Dual Power Flexibility: Operates on standard 24VAC or battery power, making it ideal for wall-furnace or 750 millivolt heating systems.
• Enhanced System Protection: Features a selectable 5-minute compressor delay to prevent hardware damage from short-cycling.
• Customizable Performance: Technician-level setup menu allows for precise adjustment of temperature swing and setpoint limits.
• Simplified Installation: Equipped with large terminal blocks and a universal sub-base to reduce time spent on the job site.

Is the Robertshaw RS8110 compatible with heat pumps?
Yes, it is designed for single-stage heat pumps that do not require auxiliary or emergency heat. It features dedicated O and B terminals for the reversing valve.

Do I need a C-wire to install this thermostat?
No, a common wire is optional. The RS8110 can be powered by two AAA batteries, though hardwiring to 24V AC is recommended when possible.

Can this replace a Honeywell or Braeburn thermostat?
The Robertshaw RS8110 is a viable technical alternative for various 1H/1C non-programmable models like the Honeywell TH3110U2008 or Pro1 T701, provided the system requirements match.

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.