--- product_id: 19299902 title: "Emerson Thermostats 1E78-140 Non-Programmable Heat Only Thermostat for Single-Stage Systems, White" brand: "white-rodgers" price: "223.14 DT" currency: TND in_stock: true reviews_count: 13 category: "White Rodgers" url: https://www.desertcart.tn/products/19299902-emerson-thermostats-1e78-140-non-programmable-heat-only-thermostat-single store_origin: TN region: Tunisia --- # Backlit easy-read digital display ±1°F precision control Simple non-programmable setup Emerson Thermostats 1E78-140 Non-Programmable Heat Only Thermostat for Single-Stage Systems, White **Brand:** white-rodgers **Price:** 223.14 DT **Availability:** ✅ In Stock ## Summary > 🔥 Stay cozy, stay sharp — 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?** 223.14 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/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 any wall, blending style with function. - • **Effortless Visibility:** Backlit digital display ensures you see your settings clearly, day or night. - • **Plug & Play Simplicity:** Non-programmable design means zero hassle—just set it and forget it. - • **Seamless Compatibility:** Optimized for single-stage heat-only systems, perfect for oil and hydronic heating. - • **Precision Temperature Mastery:** Maintain your comfort with ±1°F accuracy—no more guessing games. ## Overview The Emerson 1E78-140 is a battery-powered, non-programmable 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 and hydronic heating setups. Its compact vertical design and easy installation make it a top choice for millennial professionals seeking efficient, no-fuss home comfort. ## 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: 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. Review: Nice upgrade to the RVs thermostat for the heater - Item was easy to install and worked. I went with this thermostat over the other Honeywell one that a lot of people seem to use. I went with this one because it shows you a battery indication when it's time to change out the AA batteries ## 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 | | Additional Features | Easy to Read | | Backlight | Yes | | Best Sellers Rank | #30,712 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #17 in Home Nonprogrammable Thermostats | | Brand | White-Rodgers | | Brand Name | 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 out of 5 stars 4,455 Reviews | | Display Type | Digital | | Finish Types | Matte | | Global Trade Identification Number | 00786710518348 | | Included Components | White-Rodgers 1E78-140 Thermostat Wall Dig Heat Only | | Item Dimensions D x W x H | 30"D x 8"W x 6"H | | Item Type Name | White-Rodgers 1E78-140 Thermostat Wall Dig Heat Only | | Item Weight | 0.1 Pounds | | Manufacturer | Copeland | | Manufacturer Part Number | 1E78-140 | | Manufacturer Warranty Description | 5 year limited. | | Model Name | 1E78-140 | | Model Number | 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 | | Product Style | 70 | | Shape | Curved | | Smart Home Compatibility | Not Smart Home Compatible | | Special Feature | Easy to Read | | Specific Uses For Product | Heater | | Temperature Control Type | manual | | UPC | 786710518348 | | Unit Count | 1.0 Count | | 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) ## 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 ### ⭐⭐⭐⭐⭐ 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. ### ⭐⭐⭐⭐⭐ 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 ### ⭐⭐⭐⭐⭐ So Far, So Good! *by W***Y on December 25, 2025* Works perfectly even on a Millivolt system( floor furnace ). I love the digital control over my last Honeywell thermostat. The temperature stays constant now hence no need to be playing with the thermostat setting all day! The Honeywell thermostat I had was flawed I think intentionally to sell more thermostats because no engineer in their right mind would design a thermostat with set of contacts that suffer from bi-metal corrosion increasing the resistance which made it fail just slightly after one year of usage! Just a heads up, when you buy your thermostat, test the relay contact resistance before installing! The standard resistance reading for this particular thermostat should fall between 0.3 - 0.4Ω. Some people are selling used thermostats and taking advantage of unsuspecting buyers! I've tested some that measured between 2 - 7Ω and that means the relay contacts are corroded and not making a good enough connection to even work with a millivolt system. Here's how you test your 'new' thermostat to see if it is actually new and that you haven't been scammed! Just grab a digital millimeter and set it to OHM and install two temporary wires onto the two screw terminals on the right hand side of the thermostat. Make sure you solder the ends of the stripped wire to keep them from corroding which insures the lowest resistance reading possible! Flip the thermostat switch into "HEAT" mode and install the batteries. The thermostat should now be powered on and displaying a temperature. Next, increase temperature setting till you hear the relay click closed. Now make your measurement across the two wires you just installed and if reading is higher than 0.3 - 0.4Ω then box it back up, return it for a replacement or refund. Also, if you have to make a wire splice on a millivolt system because you're existing thermostat wires don't reach the screw terminals. Solder all your new connections together to achieve the lowest resistance possible especially if you're dealing with a millivolt system. If you're still having issues then I'd advise you to check the amount of millivolts the thermopile is putting out! Even a new thermostat would solve the problems that a weak thermopile or pilot flame issue causes so just be aware of that fact before you go blaming it on the thermostat. Hope that helps and good luck with your repair. ## Frequently Bought Together - Emerson Thermostats 1E78-140 Non-Programmable Heat Only Thermostat for Single-Stage Systems, White - Mr. Heater F260550 Big Maxx MHU50NG Natural Gas Unit Heater,Black - Honeywell TH1100DV1000 Pro-Digital 2-Wire Heat Only --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/19299902-emerson-thermostats-1e78-140-non-programmable-heat-only-thermostat-single](https://www.desertcart.tn/products/19299902-emerson-thermostats-1e78-140-non-programmable-heat-only-thermostat-single) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-06-17*