White-rodgers 01F78 151S1 Digital Thermostat Single Stage

Product Description

The WHITE-RODGERS 01F78 151S1 is a single-stage economy digital thermostat designed for residential and light commercial HVAC systems. It supports one heating stage and one cooling stage, covering a control range of 45 to 99 degrees F. The unit operates on battery power, eliminating the need for a common wire and simplifying installation in systems without a dedicated power wire. Voltage compatibility spans from millivolt to 30 volts, accommodating a broad range of low-voltage and millivolt heating systems including gas fireplaces, boilers, and conventional forced-air systems. HVAC technicians and experienced DIYers are the primary installers.

This thermostat is suited for single-stage heating and cooling applications in residential settings and light commercial environments. Its battery-powered design makes it a practical choice for retrofit installations where running a C-wire is not feasible. The millivolt-to-30-volt operating range allows it to serve both standard 24-volt systems and millivolt appliances, broadening its application across a variety of HVAC and heating equipment configurations.

Key Features

• Single-stage heating and cooling control (1 Heat, 1 Cool)
• Temperature control range of 45 to 99 degrees F
• Battery powered — no common wire required for operation
• Compatible with millivolt to 30-volt systems, including 24-volt low-voltage controls
• Economy digital design with electronic switching
• Package quantity of one unit per order

Compatibility

Designed as an OEM-style replacement or upgrade thermostat for single-stage residential and light commercial HVAC systems operating on millivolt to 30-volt electrical systems.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified installer. Always shut off power to the HVAC system at the breaker before disconnecting or wiring the thermostat. Because this unit is battery powered, confirm battery installation and polarity before mounting. Follow local codes and the equipment manufacturer wiring diagram when making terminal connections.