White-Rodgers 1E78-144 Thermostat

The White-Rodgers 1E78-144 is a professional-grade, non-programmable digital thermostat designed for single-stage 1H/1C systems. Engineered as a vertical mount thermostat, this unit serves as a direct replacement for the 1E30-913, utilizing a universal subbase that simplifies retrofits by covering wall marks from older mechanical models. Operating on 24V power with a battery backup (two AAA batteries), it ensures reliability in gas, oil, electric, and millivolt heat systems. The 1.2-square-inch backlit LCD display provides electronic accuracy within +/- 1 degree, maintaining tight environmental control. Technicians benefit from standard terminal designations (RC, RH, W, Y, O, B, G), supporting both heat pump and conventional AC configurations. Its low-profile design and selectable Celsius or Fahrenheit options make it a versatile choice for residential service calls where simple, dependable climate control is required without the complexity of scheduling.

Key Benefits

• Universal Compatibility: Seamlessly replaces mechanical thermostats and is the 1E30-913 replacement for existing vertical subbase setups.
• Broad System Support: Works with single-stage heat pumps, forced air furnaces, and 750mV millivolt systems.
• Precision Control: High electronic temperature accuracy prevents wide swings, protecting system components.
• Easy Installation: The battery-powered design eliminates the immediate need for a C-wire in most 24V HVAC systems.

Common Questions

Does this unit require a C-wire?
No, the 1E78-144 is primarily battery-powered, making it ideal for older 4-wire systems where a common wire is unavailable.

Is this compatible with 2-stage heating or cooling?
No, this model is strictly for single-stage 1H/1C applications. For multi-stage equipment, a different 70 Series or Blue Series model is required.

Can I use this for a heat pump system?
Yes, it is compatible with single-stage heat pumps (without auxiliary heat) using the O/B terminal logic.

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.