---
product_id: 19299902
title: "Emerson Thermostats 1E78-140 Non-Programmable Heat Only Thermostat for Single-Stage Systems, White"
brand: "white-rodgers"
price: "₩87444"
currency: KRW
in_stock: true
reviews_count: 13
category: "White Rodgers"
url: https://www.desertcart.kr/products/19299902-emerson-thermostats-1e78-140-non-programmable-heat-only-thermostat-single
store_origin: KR
region: South Korea
---

# Backlit easy-read digital display ±1°F precision control Battery powered with included AAA batteries Emerson Thermostats 1E78-140 Non-Programmable Heat Only Thermostat for Single-Stage Systems, White

**Brand:** white-rodgers
**Price:** ₩87444
**Availability:** ✅ In Stock

## Summary

> 🔥 Stay cozy, stay in control — precision heating made simple!

## Quick Answers

- **What is this?** Emerson Thermostats 1E78-140 Non-Programmable Heat Only Thermostat for Single-Stage Systems, White by white-rodgers
- **How much does it cost?** ₩87444 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/19299902-emerson-thermostats-1e78-140-non-programmable-heat-only-thermostat-single)

## Best For

- white-rodgers enthusiasts

## Why This Product

- Trusted white-rodgers brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Sleek & Space-Savvy:** Compact vertical profile fits discreetly on your wall, blending modern minimalism with function.
- • **Effortless Visibility:** Backlit digital display ensures you can check and adjust settings anytime, even in low light.
- • **Plug & Play Simplicity:** Non-programmable design means zero complexity—just set it and enjoy reliable heat control.
- • **Seamless Compatibility:** Optimized for single-stage heat-only systems, perfect for oil furnaces and hydronic boilers.
- • **Precision Perfect Comfort:** Maintain your ideal temperature with ±1°F accuracy—no more guessing, just consistent warmth.

## Overview

The Emerson 1E78-140 is a non-programmable, battery-powered thermostat designed for single-stage heat-only systems. Featuring a large backlit digital display and ±1°F temperature accuracy, it offers straightforward, reliable control for oil furnaces and hydronic boilers. Its compact vertical design and easy installation make it a top choice for professionals seeking efficient, no-fuss heating management.

## Description

The Emerson 1E78-140 single stage thermostat has an easy to read digital display. This non-programmable thermostat works with most single stage heat only systems. Is for use on 24 volt and millivolt systems. *Not compatible with electric baseboard heat and some other systems.

Review: Great Thermostat for oil heat Furnace - Very easy to install for a heat only system. Works exactly as it should now my furnace will work more efficiently. Very durable construction that is compatible for my heat only system. With a low price point. Compatible and controls are easy to use. +++++ product
Review: Love this thermostat, works great and great display! - I love this heat only thermostat. It is easy to install and instructions are great. Even when the display is not illuminated the display is large and easy to read even for me with bad eyes. The display is so much better then the Honeywell rh110b that it replaces, which has a monochrome like display where the numbers are almost the same shade as the background and does not have a light. This is a perfect choice if you have just two wires, white and red used for forced hot water hydronic heat with an oil boiler. You also have to clip one of the jumpers on the circuit board that makes your boiler react correctly using hot water heat. The construction is also better then the Honeywell and easier to use. This replaces the old round Honeywell that had a twist dial and mercury switch which I used to have some years back. Update 11/14/19: I have put in to return this thermostat and get a new one. The flame Icon doesn't turn on when the thermostat calls for heat, it stays on all the time so I don't know if it's defective. I believe it comes on when you select a temp that is higher than the room temp and shows it's talking to boiler to get heat. So I am returning to see if it is defective. Update 11/18/19: I have received a replacement thermostat and installed it. The thermostat performed the same as the last one. I have found that once you turn the switch from off to heat, the flame icon stays on until you turn the thermostat off. The flame icon has nothing to do with the heater status. I sent a question to Emerson and have not got a response about the function of the flame icon. I am moving my rating to five stars as the thermostat is functioning properly and is a quality product that does exactly what it is supposed to do. I do hear a click as I raise the temperature above the room temperature, so I believe it functions just fine and keeps the temperature right at set temp. Update: I did not clip the 905 jumper as it suggests and this keeps room temp right at set temp without overshooting the set temp. It is very easy to clip the jumper if you decide to.

## Features

- Easy-to-read digital display with backlight
- Non-programmable thermostat
- Compatible with single stage heat only systems
- Precision control of plus/minus 1 degree F
- Vertical profile
- Dimensions: 5-5/16"H x 3-3/16"W x 1-1/8"D
- Large easy to read digital display
- 1⁰ Accuracy

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00204WWGE |
| Backlight | Yes |
| Batteries | 3 AAA batteries required. (included) |
| Best Sellers Rank | #10,999 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #7 in Home Nonprogrammable Thermostats |
| Brand | White-Rodgers |
| Color | White |
| Connectivity Protocol | BACnet MS/TP |
| Connectivity Technology | Wired |
| Control Method | Touch |
| Control Type | Button Control |
| Controller Type | Hand Control |
| Customer Reviews | 4.5 4.5 out of 5 stars (4,398) |
| Date First Available | March 23, 2009 |
| Display Type | Digital |
| Global Trade Identification Number | 00786710518348 |
| Included Components | White-Rodgers 1E78-140 Thermostat Wall Dig Heat Only |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1.6 ounces |
| Item model number | 1E78-140 |
| Manufacturer | White-Rodgers |
| Manufacturer Part Number | 1E78-140 |
| Model Name | 1E78-140 |
| Mounting Type | Wall Mount |
| Number of Batteries | 3 AAA batteries required. (included) |
| Power Source | Battery Powered |
| Product Dimensions | 30"D x 8"W x 6"H |
| Shape | Curved |
| Special Feature | Easy to Read |
| Special Features | Easy to Read |
| Specific Uses For Product | Heater |
| Style | 70 |
| Temperature Control Type | manual |
| UPC | 786710518348 |
| Voltage | 24 Volts |
| Wattage | 45 |

## Product Details

- **Brand:** White-Rodgers
- **Controller Type:** Hand Control
- **Model Name:** 1E78-140
- **Product Dimensions:** 30"D x 8"W x 6"H
- **Special Feature:** Easy to Read

## Images

![Emerson Thermostats 1E78-140 Non-Programmable Heat Only Thermostat for Single-Stage Systems, White - Image 1](https://m.media-amazon.com/images/I/41nLXMBqcnL.jpg)
![Emerson Thermostats 1E78-140 Non-Programmable Heat Only Thermostat for Single-Stage Systems, White - Image 2](https://m.media-amazon.com/images/I/31smiijw9gL.jpg)

## Questions & Answers

**Q: Does the display light up as shown in the description? That would make it easier to read.**
A: Look at Answer 1 (Maina, answered on December 13, 2015). YES, it has a backlight! I just followed these instructions on my newly-installed thermostat, and it lights up beautifully.

**Q: I followed the instructions to turn the backlight on. it worked first day but then stopped working. so i followed instructions again. why it stopped?**
A: You probably didn't turn the 'Heat on/off' button to 'off' after setting the backlight to on.  The process is:
1. Switch bottom button to 'Heat'. Press up and down arrows at same time for 2 seconds. Display alternates with FF and L flashing.
2. Push 'Up' or 'Down' button to select FF.
3. Now, make sure you set the bottom button to 'Off' to make the backlight setting permanent.  Backlight will come on now whenever you press the up or down arrow buttons.  Goes off after a few seconds if the buttons aren't being depressed.

**Q: can i use it in an rv with a 12 (2 wire) volt system?**
A: If it’s just heat only you can use it but if you have a duct system with ac and heat you cannot use it

**Q: Will this work with a Cozy gas wall heater that uses 2 wires?**
A: From what i learned back when i did my research is a 2 wire system will work with any 2 wire thermostat. ..it worked on mine and works perfect...and saves me on my gas bill...if your still unsure i would recommend calling the manufacturer...good luck

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great Thermostat for oil heat Furnace
*by F***H on January 12, 2026*

Very easy to install for a heat only system. Works exactly as it should now my furnace will work more efficiently. Very durable construction that is compatible for my heat only system. With a low price point. Compatible and controls are easy to use. +++++ product

### ⭐⭐⭐⭐⭐ Love this thermostat, works great and great display!
*by S***D on November 13, 2019*

I love this heat only thermostat. It is easy to install and instructions are great. Even when the display is not illuminated the display is large and easy to read even for me with bad eyes. The display is so much better then the Honeywell rh110b that it replaces, which has a monochrome like display where the numbers are almost the same shade as the background and does not have a light. This is a perfect choice if you have just two wires, white and red used for forced hot water hydronic heat with an oil boiler. You also have to clip one of the jumpers on the circuit board that makes your boiler react correctly using hot water heat. The construction is also better then the Honeywell and easier to use. This replaces the old round Honeywell that had a twist dial and mercury switch which I used to have some years back. Update 11/14/19: I have put in to return this thermostat and get a new one. The flame Icon doesn't turn on when the thermostat calls for heat, it stays on all the time so I don't know if it's defective. I believe it comes on when you select a temp that is higher than the room temp and shows it's talking to boiler to get heat. So I am returning to see if it is defective. Update 11/18/19: I have received a replacement thermostat and installed it. The thermostat performed the same as the last one. I have found that once you turn the switch from off to heat, the flame icon stays on until you turn the thermostat off. The flame icon has nothing to do with the heater status. I sent a question to Emerson and have not got a response about the function of the flame icon. I am moving my rating to five stars as the thermostat is functioning properly and is a quality product that does exactly what it is supposed to do. I do hear a click as I raise the temperature above the room temperature, so I believe it functions just fine and keeps the temperature right at set temp. Update: I did not clip the 905 jumper as it suggests and this keeps room temp right at set temp without overshooting the set temp. It is very easy to clip the jumper if you decide to.

### ⭐⭐⭐⭐⭐ Instructions Suck for Installing
*by A***K on February 8, 2026*

Perfect for my Grooming van. Swapped out older analog for this newer digital. You connect either wire to RH and W and remove the wire bridge. I had to read reviews to figure this out because directions are sucky. Same would apply for any older unit with only 2 wires for a propane heater in their rig. Works great otherwise

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-02-24*