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White rectangular digital thermostat with blue backlit display and push-button controls

Emerson Climate Technologies

Emerson 1F95-0671 Low Voltage Thermostat 24VAC

SKU CH-01RS-WZ1NK

A digital programmable thermostat controlling up to four heating and two cooling stages with 7, 5-1-1 or non-programmable scheduling options

  • TypeDigital Programmable Multi Stage H/C or HP
  • 4 heat / 2 cool stages suit multi-stage systems
  • 7-day, 5-1-1 or non-programmable scheduling fits any routine
  • 6 sq in blue backlit display reads clearly in low light
  • Keypad lockout prevents unauthorised changes
  • Auto changeover switches between heating and cooling automatically

Emerson 1F95-0671 Programmable Thermostat

The Emerson 1F95-0671 is a low-voltage digital thermostat designed for residential and light-commercial HVAC systems. It supports up to four heat stages and two cool stages, making it suitable for multi-stage conventional or heat-pump equipment. Installers and facility managers can choose between 7-day, 5-1-1 or non-programmable scheduling to match occupancy patterns.

Sustained Operation and Stage Control

The thermostat manages multi-stage heating and cooling cycles through automatic changeover, switching between modes without manual intervention. A backlit blue display remains legible during continuous use, while programmable fan and keypad lockout functions help maintain consistent airflow and prevent unauthorised adjustments over long periods. System switching covers Auto, Heat, Cool, Off and Emergency positions for full seasonal control.

Installation Notes and Common Issues

Terminal designations include RH, RC, C, Y, Y2, W/E, W2, G, O/B, L, 6, +, S and -, requiring careful wiring to match the equipment schematic. The unit operates on 24VAC power and lacks WiFi capability, so remote access is not available. Missing a common wire or misplacing stage wires are the most frequent causes of erratic staging or display failure after installation.

Highlights

  • 4 heat / 2 cool stages suit multi-stage systems
  • 7-day, 5-1-1 or non-programmable scheduling fits any routine
  • 6 sq in blue backlit display reads clearly in low light
  • Keypad lockout prevents unauthorised changes
  • Auto changeover switches between heating and cooling automatically

Specifications

BrandEMERSON
TypeDigital Programmable Multi Stage H/C or HP

Questions about this item

How much power does the 1F95-0671 thermostat draw when running continuously on a 24VAC circuit?

The thermostat operates on 24VAC low-voltage power from the HVAC system transformer; its own current draw is very small and does not add noticeable heat or noise to the installation.

Which existing wires and terminals must be present on the HVAC system for the 1F95-0671 to function?

The system must provide compatible connections for the required terminals: RH, RC, C, Y, Y2, W/E, W2, G, O/B, L, 6, +, S, and - for full multi-stage heat and cool control.

Will the 1F95-0671 control an older single-stage furnace and air conditioner without extra modules?

Yes, it supports single-stage equipment by using the basic W/E, Y, G, and C terminals while leaving the second-stage terminals unused.

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