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Gray rectangular programmable thermostat with backlit display

WHITE RODGERS (EMERSON ELEC)

WHITE RODGERS (EMERSON ELEC) 1F83C-11PR Low Voltage Thermostat 24VAC Gray

SKU CH-4VWP-FXS55

A programmable 24 VAC thermostat with a backlit display, permanent memory, filter reminder and keypad lockout for gas, oil or electric heat

  • TypeProgrammable Thermostats
  • Programmable schedule saves energy with permanent memory retention
  • Backlit display improves visibility in low-light conditions
  • Universal back plate simplifies installation and future upgrades
  • Filter change reminder protects system efficiency automatically
  • Keypad lockout prevents unauthorised temperature adjustments

Programmable low-voltage thermostat

This Emerson thermostat provides programmable control for single-stage heating and cooling systems. It operates on 24 VAC power and fits gas, oil or electric equipment. The universal back plate simplifies replacement and allows future upgrades without rewiring. A keypad lockout helps prevent unauthorised changes.

Thermals noise and power draw

As a low-voltage control device, the thermostat draws minimal power from the 24 VAC supply and produces no audible noise during normal operation. It generates no measurable heat that would affect room temperature readings. The unit maintains its programmed schedule through permanent memory even if power is interrupted.

Backlit display filter reminder lockout

The large backlit display remains readable in low light and shows temperature setpoint limits at a glance. A built-in filter-change reminder prompts routine maintenance to protect HVAC efficiency. Keypad lockout secures settings against tampering in shared or public spaces.

Highlights

  • Programmable schedule saves energy with permanent memory retention
  • Backlit display improves visibility in low-light conditions
  • Universal back plate simplifies installation and future upgrades
  • Filter change reminder protects system efficiency automatically
  • Keypad lockout prevents unauthorised temperature adjustments

Specifications

BrandEmerson
TypeProgrammable Thermostats

Questions about this item

How is the universal back plate used during installation, and what wiring step is often missed?

Mount the universal back plate first, then connect the 24VAC low-voltage wires to the matching terminals for one heat stage and one cool stage before snapping the thermostat onto the plate.

Which maintenance reminder is built in, and how is it reset after service?

A filter-change reminder appears on the display; after replacing the filter, clear the alert through the thermostat's menu using the keypad.

At what point does the keypad lockout engage, and can it be overridden locally?

The lockout activates when enabled in the settings and requires the programmed keypad sequence to unlock; there is no separate hardware override.

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