Robertshaw Line Voltage Thermostats

Robertshaw Line Voltage Thermostats: A Century of Precision Heating Control

Robertshaw brings more than a century of engineering expertise to the world of line voltage thermostats. Founded in 1899, the brand has spent generations refining temperature control technology for residential and commercial applications alike. When it comes to directly switching line-level power to electric heaters and baseboard heating systems, Robertshaw's purpose-built line voltage thermostats stand out as one of the most trusted solutions in the HVAC trade.

The 800 Series: The Benchmark for Line Voltage Control

Robertshaw's flagship offering in this category is the 800 Series Line Voltage Thermostat lineup, which includes the 801, 802, and 803A models. These thermostats are engineered to deliver the kind of precision and accuracy that professionals expect from a low-voltage controller — but at full line voltage. The series covers the most common wiring configurations, with models available for single-line break (SPST) heating, double-line break (DPST) heating, and single-line break (SPST) cooling, ensuring there is a right-fit solution for virtually every electric heating or cooling application.

A key advantage of the 800 Series is its universal replacement capability. These units can retrofit most existing electric heat thermostats from a wide range of competing brands, making them the go-to choice for service technicians and contractors who want to simplify their parts inventory and speed up installations on the job site.

Engineering Features That Matter

Robertshaw's 800 Series line voltage thermostats incorporate several design choices that reflect decades of installer and contractor feedback:

• Bimetal Temperature Sensing — Provides improved thermal accuracy and consistent performance across a wide temperature range.
• Mercury-Free Design — Eliminates the need for leveling the thermostat during installation and removes the burden of special disposal requirements.
• J-Box Compatible — Mounts directly to a standard electrical junction box, meeting code requirements while significantly speeding up the installation process.
• Positive-Off Switch — Ensures assured, complete shutdown of the HVAC system, adding a layer of safety and reliability.
• Vertical Temperature Display — An at-a-glance comfort level display makes it easy for homeowners and technicians to read the set point quickly.
• Electrical Rating — Rated for 18–25A at 120/240/277VAC non-inductive, covering the broad range of residential and light commercial electric heating equipment.

Why Professionals and Homeowners Choose Robertshaw

With a heritage that spans more than a century, Robertshaw has built its reputation by working directly with contractors and installers to understand real-world needs. The result is a line voltage thermostat that is not only highly accurate and dependable but also straightforward to install and service. The 800 Series carries a one-year limited warranty, and the brand's commitment to mercury-free, J-box-compatible designs reflects a forward-thinking approach to both environmental responsibility and on-the-job efficiency. For anyone managing electric baseboard heat, wall heaters, or fan-forced heaters, Robertshaw's 800 Series line voltage thermostats represent a reliable, time-tested upgrade path.