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White rectangular thermostat with large backlit display

White Thermostat 2H/1C Heat Pump Large Backlit Display

SKU CH-ESM0-T478D

Controls heat-pump or single-stage HVAC systems up to 2H/1C with a large backlit display

  • Product typeBattery-Powered/Hard-Wired Operation
  • Product colorWhite
  • Key featuresBattery-Powered/Hard-Wired Operation
  • Controls heat-pump and conventional systems up to 2H/1C
  • Large backlit LCD shows temperature clearly in any light
  • Battery or hard-wired power gives flexible installation options
  • Adjustable temperature swing and compressor delay protect equipment
  • Simple front-load battery access and °C/°F conversion simplify daily use

Premium Heat Pump Thermostat

This thermostat controls heat-pump systems up to two heating stages and one cooling stage, plus conventional single-stage forced-air, electric-furnace, hot-water, steam, gravity, heat-only, millivolt, gas-fireplace, floor-furnace and cool-only configurations. It is not for two-transformer, conventional multi-stage, dual-fuel, electric-baseboard, line-voltage, radiant-ceiling, mini-split or 12 V RV systems.

Battery or Hard-Wired Operation

The unit runs on batteries or a 24 V hard-wired supply and includes a front-load battery compartment for easy swaps. A selectable compressor-delay protection helps guard the outdoor unit during short cycles, while an adjustable temperature differential lets you balance run-time against comfort.

Large Backlit Display and Universal Sub-Base

A big backlit LCD shows temperature in °C or °F with user calibration, and the universal sub-base with large terminal blocks supports installation in roughly 30 minutes. Buyers who need multi-stage conventional heating or dual-fuel setups should look elsewhere.

How it compares

Measured against everything we stock in Thermostats & Thermostat Accessories, at today’s prices. Recalculated every night.

Price $50.99
Cheaper than about 64% of the 286 comparable items (median $78.49).

Specifications

Product
Brand nameCoiiwsei
Product typeBattery-Powered/Hard-Wired Operation
Product colorWhite

Questions about this item

How do I wire this thermostat and which step do people often miss?

Mount the universal sub-base, connect each wire to the large terminal blocks matching your system labels, then insert two AA batteries before snapping the front on; the step most installers forget is setting the compressor-delay jumper to ON for heat-pump protection.

What will need replacement down the road?

The two AA batteries powering the display and memory typically last about 12 months; plan to swap them annually or when the low-battery icon appears.

What is the first limitation you hit during a long heating cycle?

The built-in compressor-delay protection enforces a minimum off-time of 5 minutes, so the system cannot restart cooling or auxiliary heat until that delay clears.

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