Ranco

Ranco: A Legacy of Precision HVAC & Refrigeration Controls

Ranco is one of the most recognized names in electronic and electromechanical controls for the HVAC, refrigeration, and automotive air conditioning industries. Temperature & Pressure Controls form the backbone of the Ranco product lineup — and for good reason. Since 1937, the brand has engineered controls that keep commercial and residential systems operating safely and efficiently, earning a reputation for durability and precision that professionals trust on the job site.

Ranco operates today as a brand under Robertshaw, a company whose roots trace back to 1899 when Frederick W. Robertshaw invented the thermostat. That heritage of innovation carries forward into every Ranco product, from simple electromechanical switches to sophisticated digital controllers. Robertshaw has accumulated over 2,000 patented inventions across its portfolio, and the Ranco line reflects that commitment to solving real-world HVAC and refrigeration challenges.

At the heart of Ranco's lineup are their celebrated ETC Series Electronic Temperature Controllers. These units offer a wide operating range from -30°F to 220°F, selectable heating and cooling modes, and multi-voltage inputs, making them a flexible replacement for traditional electromechanical controls in commercial refrigeration and HVAC applications. Whether you need single-stage or dual-stage control, Ranco has an ETC model designed for the application.

Beyond temperature, Ranco is equally known for its HVAC Pressure Switches. These controls are engineered to protect compressors from dangerous high- and low-pressure conditions, covering pressure ranges that span common HVAC refrigerants. Their single and dual pressure controls feature robust construction and are trusted to safeguard expensive compressor systems in commercial refrigeration and air conditioning equipment.

Heat pump technicians will also find Ranco indispensable. The brand's Heat Pump Reversing Valves & Defrost Parts include solenoid-operated reversing valves that reliably switch refrigerant flow direction between heating and cooling cycles. These components are a critical link in heat pump performance, and Ranco manufactures them to meet the demanding cycle-life requirements of modern equipment.

For zone and equipment-level temperature management, Ranco's Thermostats & Accessories deliver dependable on/off control across a broad range of commercial heating, cooling, and refrigeration applications. Their line-voltage mechanical and electronic thermostats are designed for flexibility, featuring programmable stages and LCD readouts for at-a-glance system status.

Rounding out the lineup, Ranco also offers Humidity Sensors & Humidistats to address moisture control needs alongside temperature management — an increasingly important consideration in modern HVAC system design. Whether you're maintaining a cold storage facility, servicing a commercial cooling system, or building out a precision climate control solution, Ranco provides the controls to get the job done right.