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Gray square wall thermostat with dial, surface or flush mount

Emerson Climate Technologies

Emerson Climate Technologies 152-10 Line Volt Mechanical Thermostat

SKU CH-T8CT-Q6EYN

A line-voltage mechanical thermostat that opens on temperature rise to control heating circuits from 40 to 90 degrees Fahrenheit

  • ColorGray
  • SPST switch handles 14 A at 120 V for reliable heating control
  • 40 to 90 °F range covers typical residential comfort settings
  • Open-on-rise action cuts power when temperature exceeds set point
  • 3 °F differential prevents short-cycling of heating equipment
  • Gray finish blends with standard wall plates

What this thermostat controls

The Emerson 152-10 is a line-voltage mechanical thermostat built for electric heating systems. It uses a single-pole switch that opens when temperature rises, breaking the circuit to stop heat output. Rated for 120 to 240 V AC, it handles 14 A at 120 V and 7 A at 240 V, making it suitable for baseboard heaters, radiant panels and similar resistive loads.

When to choose this over a low-voltage stat

Low-voltage thermostats cannot switch line-voltage heaters directly; they require a separate relay or contactor. The 152-10 eliminates that extra component and wiring step. The jump is worth it when you want a single device that mounts on the wall and controls the heater circuit without a transformer, relay box or additional low-voltage wiring run.

Mounting and common wiring mistakes

The unit fits a standard box or flush-to-wall opening and measures 4 1/2 in high by 4 1/2 in wide by 2 1/4 in deep. A frequent error is connecting a neutral wire to the switch terminals; the SPST action only interrupts the hot conductor. Another issue is setting the dial outside the 40 to 90 °F range or ignoring the fixed 3 °F differential, which can cause short-cycling if the heater output overshoots the space.

Highlights

  • SPST switch handles 14 A at 120 V for reliable heating control
  • 40 to 90 °F range covers typical residential comfort settings
  • Open-on-rise action cuts power when temperature exceeds set point
  • 3 °F differential prevents short-cycling of heating equipment
  • Gray finish blends with standard wall plates

Specifications

BrandEmerson
ColorGray

Questions about this item

Will the 4 1/2 in by 4 1/2 in thermostat cover a standard wall box or need a flush cut?

The unit is sized for box or flush-to-wall mounting and matches a typical 4 1/2 in square footprint.

Which wires go to the SPST switch and how do I avoid reversing line and load?

Connect the hot supply to one terminal and the heater lead to the other; the SPST action opens on rise so reversing them swaps control logic.

How often should I verify the 3 degree differential and 2 degree sensitivity stay accurate?

Check calibration annually before heating season; mechanical contacts can drift and the fixed 3 °F differential is not field-adjustable.

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