White-rodgers 1d78-140 Single Stage Thermostat 65F

Product Description

The WHITE-RODGERS 1d78-140 is a single-stage heating thermostat designed for new construction temporary applications. Configured for one heating stage and no cooling stage (1H/0C), it ships with a fixed 65 degrees F setpoint — a common requirement for protecting newly built structures during construction. This thermostat requires the F4-1748 terminal base for installation and is not intended for permanent residential or commercial HVAC system commissioning. Licensed HVAC technicians and mechanical contractors handling new construction jobsite temperature control are the primary installers.

This thermostat is used in new construction settings where a temporary, low-cost heating control is needed to maintain a minimum space temperature. The fixed 65 degrees F setpoint keeps the structure above critical thresholds during framing, drywall, painting, or concrete curing phases. Because it relies on the F4-1748 terminal base, it slots into an existing base infrastructure on jobsites where that base is already deployed or ordered alongside this unit. It is not suited for permanent occupancy thermostat applications.

Key Features

• Single-stage heating control (1H/0C) — no cooling stage
• Fixed 65 degrees F setpoint for new construction temporary use
• Requires F4-1748 terminal base for mounting and wiring
• Designed for temporary jobsite temperature maintenance during construction phases
• Compact thermostat head that separates from base for easy swap-out

Compatibility

Designed for use with the WHITE-RODGERS F4-1748 terminal base, which must be ordered and installed separately. Suitable for single-stage heating systems in new construction temporary control scenarios.

Installation Notes

Installation must be performed by a qualified HVAC technician or mechanical contractor familiar with low-voltage thermostat wiring. Power down the heating system at the disconnect or breaker before wiring the terminal base or attaching the thermostat head. The F4-1748 terminal base must be installed first — do not attempt to wire this thermostat without the correct base. Follow all applicable local mechanical codes and NEC low-voltage wiring requirements.

Technical Specifications

• Configuration: 1 Heat / 0 Cool (1H/0C)
• Setpoint: 65 degrees F (fixed)
• Application: New construction temporary
• Required Accessory: F4-1748 terminal base (sold separately)
• UPC: 786710518782

Standard Information

• Brand: WHITE-RODGERS
• Manufacturer Part Number: 1d78-140