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White rectangular wall thermostat with backlit display and push buttons

White-Rodgers 70 Series 1F78-151 HVAC Control 5-2 Day Programmable Thermostat

SKU CH-JA27-RHQXW MPN 1F78-151

A 5-2 day programmable thermostat with backlit display for single-stage heating, cooling and heat-pump systems, battery-powered with precise ±1 °F control

  • TypeCooling/Heating, Push Button
  • Size/Dimensions1.75 in x 6.25 in x 4.25 in
  • ColorWhite
  • Voltage125VAC
  • Mount TypeWall Mount
  • Relay Contact70 Series, 24 volts
  • Programmable 5-2 day schedule fits weekday and weekend routines
  • Easy-to-read backlit display shows temperature clearly in any light
  • Precise control within plus/minus 1 degree Fahrenheit maintains comfort
  • Battery powered with two AAA cells included for broad system compatibility
  • Works with single-stage heating, cooling and heat pump systems without auxiliary heat

Product identity

The White-Rodgers 70 Series 1F78-151 is a 5-2 day programmable thermostat designed for single-stage heating, cooling and heat-pump systems without auxiliary heat. It mounts on a wall and operates on 24-volt or millivolt control circuits with a 125 VAC supply rating. The pack contains twelve units, each sold individually.

Who it suits and who it does not

Homeowners who want separate weekday and weekend schedules and need battery-powered operation for broad wiring compatibility will find this model suitable. It is not intended for electric baseboard heat, multi-stage equipment or systems that require auxiliary heat control. Builders needing RF-emitting smart features should look elsewhere.

Build integration

The thermostat measures 1.75 in x 6.25 in x 4.25 in and includes two AAA batteries, freeing the installer from running a common wire. Its push-button interface and backlit display simplify set-up on existing 24-volt relay contacts. The white finish blends with standard wall plates.

Highlights

  • Programmable 5-2 day schedule fits weekday and weekend routines
  • Easy-to-read backlit display shows temperature clearly in any light
  • Precise control within plus/minus 1 degree Fahrenheit maintains comfort
  • Battery powered with two AAA cells included for broad system compatibility
  • Works with single-stage heating, cooling and heat pump systems without auxiliary heat

Specifications

TypeCooling/Heating, Push Button
BrandWhite-Rodgers, Copeland
Model1F78-151
Size/Dimensions1.75 in x 6.25 in x 4.25 in
ColorWhite
Voltage125VAC
Mount TypeWall Mount
Relay Contact70 Series, 24 volts
Standards/Certificationsnot_capable_emitting_rf_energy
Item Count12 pack
Selling Unit1
FeaturesWhite-Rodgers
Part Number1F78-151

Questions about this item

Does my HVAC system need a 24-volt relay contact for the 1F78-151 to operate?

Yes, the thermostat uses a 24-volt relay contact from the 70 Series and is designed for 24-volt and millivolt systems, not line-voltage electric baseboard heat.

Will the 1F78-151 control my existing single-stage heat pump without auxiliary heat?

It is compatible with single-stage heating, cooling and heat pump systems that do not use auxiliary heat, providing precise temperature control within plus or minus 1 degree F.

How can I confirm the 5-2 day schedule is running after I install the two AAA batteries?

The easy-to-read backlit display shows the active program period and current temperature, so you can verify the weekday and weekend schedules are executing as set.

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