---
product_id: 27042208
title: "Honeywell Home RTH221B1039 RTH221B Programmable Thermostat, White"
brand: "honeywell home"
price: "265.89 DT"
currency: TND
in_stock: false
reviews_count: 13
url: https://www.desertcart.tn/products/27042208-honeywell-home-rth221b1039-rth221b-programmable-thermostat-white
store_origin: TN
region: Tunisia
---

# 1-week programmable schedule battery change reminders ±1°F precise temp control Honeywell Home RTH221B1039 RTH221B Programmable Thermostat, White

**Brand:** honeywell home
**Price:** 265.89 DT
**Availability:** ❌ Out of Stock

## Summary

> 🌡️ Take control of your comfort—program once, relax all week!

## Quick Answers

- **What is this?** Honeywell Home RTH221B1039 RTH221B Programmable Thermostat, White by honeywell home
- **How much does it cost?** 265.89 DT with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/27042208-honeywell-home-rth221b1039-rth221b-programmable-thermostat-white)

## Best For

- honeywell home enthusiasts

## Why This Product

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

## Key Features

- • **Smart Battery Alerts:** Never get caught off guard—built-in low battery reminders keep your thermostat powered and your schedule uninterrupted.
- • **DIY Friendly Installation:** Quick, hassle-free setup with clear instructions and included mounting hardware—get your smart comfort up and running in under 30 minutes.
- • **Precision Comfort Control:** Maintain your ideal indoor climate with temperature accuracy within ±1°F, ensuring consistent coziness without energy waste.
- • **Flexible Display & Override:** Choose Fahrenheit or Celsius, 12/24-hour clock, plus easy temporary or permanent overrides to adapt on the fly without losing your program.
- • **Streamlined Weekly Scheduling:** Set one consistent program for all 7 days with 4 customizable periods—wake, leave, return, sleep—perfect for a balanced work-life rhythm.

## Overview

The Honeywell Home RTH221B1039 is a sleek, white programmable thermostat designed for simple, energy-efficient temperature management. It offers a one-week, four-period daily schedule with ±1°F precision, easy DIY installation, and smart battery reminders. Compatible with most heating and cooling systems (excluding electric baseboard and multi-stage setups), it features a clear digital display with flexible settings and override options, making it an ideal upgrade for professionals seeking reliable, consistent home comfort with minimal fuss.

## Description

Product Description This easy-to-operate 1-Week Programmable Thermostat helps make your home comfortable exactly when you want it. Programmable for one week, it lets you customize your schedule with four options – ‘wake’, ‘leave’, ‘return’, and ‘sleep’ – for precise temperature control and added comfort. Simple step-by-step instructions included with the thermostat make DIY installation easy. From the Manufacturer A Honeywell programmable thermostat can save you significant money off your energy bill. You set it up to adjust the temperature when you are away or asleep---times when you don’t necessarily need to heat or cool your home to optimum comfort---and your heating and cooling equipment runs less. This one-piece thermostat has one easy program for all days of the week (4 periods - wake, leave, return, sleep). Simple and effective use and performance.

Review: Simple replacement for round Honeywell thermostats - Replaced some old mercury 2-wire thermostats for my oil-fired furnace. No a/c. Wanted programable, but that was about it. These fit the bill. If you want each day to be individually programable, then you will need the more expensive model. This one is about half that price. This one is simple to set and simple to override if you want. Installation is easy. Remove old 'stat (note which wire was connected to which terminal, say red or white), feed the wires through the baseplate from the new thermostat and attach with the 2 included anchors and screws to the wall), and then screw the wires under the approriate set screw terminal locations that are labeled on the baseplate. For example red to red-heat (r-h), white to white. Add 2 AAA batteries (not included)to the thermostat cover and snap into place. Then program with time and set temperatures. I did four thermostats. The first one took about 25 minutes (most of the time making sure I knew which wire to hook to which terminal), the other 3 took about 10-15 minutes each. One other note. I found one degree of variation from other digital thermometers (if you check it against another one) but once set it is very stable. Update: Corrected battery size to 2-AAA. - Battery replacement is a snap ... less that 5 minutes each thermostat. Loosen the bottom set screw a couple turns (don't back out completely or you may loose it) and pull of cover from the bottom. Batteries are located in the cover and if you replace them right away you don't lose your settings. Reattach to base by setting the top first and then closing in the bottom, you can tighten the screw to hold in place. - There remains a difference between the temperature reported by the thermmostat and my other, professional indoor outdoor thermometer. These thermostats are off by about one to two degrees higher. When the actual temperature is 70F, these four read 71F or 72F. In other words, the actual temperature is about 1 to 2 degrees lower than what these thermostats show. - Two of my thermostats have the sensing thermocouples sealed (silicone?) to the inside of the cover. The other two are not sealed and I actually placed them so that they are outside the cover when installed. Doesn't seem to make a difference in performance. Still get the mismatch with actual temperature, but performance is stable. - The temporary and permanent hold features is are nice and easy to use ... particularly as a preventative measure to accomodate those family members you don't want messing around with the programing. - Would be nice if these lit up when a button is pressed. Would be much easier to read. Not a showstopper.
Review: Inexpensive upgrade from old mercury switch thermostats - I purchased this programmable thermostat to install in the portion of my two-family home that I live in. I also purchased the similar Honeywell RTH111B Vertical Digital Manual Thermostat NON-programmable model for the portion of my home that I rent out. Installation of both models is identical, and the main difference between the two is just the ability to set up a program of varying temperature changes based on your schedule. The non-programmable RTH111B has no clock feature. Just simple buttons to change the temperature up or down, and switches for a system fan (if applicable) and the HEAT-OFF-COOL selection. The programmable RTH221B gives you these same features, PLUS a 7-day, 4-event schedule to work with. In other words, every day of the week is treated the same and you can program in a time and temperature change for waking, leaving, returning, and sleeping. For people who desire to have a different schedule for the weekend, a 5/2 day programmable model would be a wiser choice. The apartment that received the RTH221B is a simple heat-only, oil-fired steam radiator system. The installation instructions were generally easy to follow, but I also found additional information on the Honeywell website explaining what each terminal actually was. It would have been useful for Honeywell to print this in the instructions. Summarized: Rh : Heating power supply Rc : Cooling power supply W : Heating signal Y : Cooling signal G : Fan Both of the two environmental systems in my home are ONLY heat, and have a two-wire connection. The wiring looked about a hundred years old, but still worked perfectly once I connected the wires to the Rh and W terminals. Interesting to note that in both installations it did not seem to make a difference which of the two wires went to what terminal, so long as it was Rh and W. However in a more complicated system that includes more wires for cooling or a fan, I'd use the included labels to mark each wire and be certain it was connected properly. Following the instructions, setting up a schedule for temperature changes was a simple process. Even if you ONLY wished to alter the temperature at night (rather than during the day while at work), it's a breeze because you'll just set the temperature the same for the "leave" and "return" events. Overall, setting the clock and programming took only a couple of minutes. I don't have any dollar amount savings to offer, but I can say that the temperature was MUCH more consistent in my apartment than it had been with the old round-style mercury switch which was prone to large temperature swings. There is no question in my mind that less fuel was used, and it's very likely that the two thermostats I purchased have already paid for themselves one month later.

## Features

- ONE WEEK PROGRAMMING: Set one identical program for the entire week with four program periods per day including wake, leave, arrive and sleep.
- PRECISE TEMPERATURE CONTROL: Precise temperature control of plus/- 1 degree Fahrenheit
- DIGITAL DISPLAY: Easy-to-read digital display with an intuitive interface for one-touch access to setpoint temperature
- EASY INSTALLATION: Easy to install yourself and basic operation keeps programming simple
- REMINDERS: Built-in battery change reminders (2 AAA batteries are required for operation)
- SET POINT RETENTION: Set point is retained in memory in the event of a power outage
- DISPLAY OPTIONS: Fahrenheit or Celsius; 12 or 24 hour clock. Note: This thermostat is not backlit.
- OVERRIDE OPTIONS: Permanent and temporary override capability
- COMPATIBLE WITH: Heating, cooling and heat pumps without auxiliary heat options
- Does NOT work with electric baseboard heat (120-240 V), heat pumps with backup, or multi-stage heating/cooling. For indoor use only.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B018A3DHJY |
| Additional Features | Clock Display, Low Battery Indicator, Low Voltage, Programmable |
| Backlight | Yes |
| Best Sellers Rank | #39,601 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #56 in Home Programmable Thermostats |
| Brand | Honeywell Home |
| Brand Name | Honeywell Home |
| Color | White |
| Connectivity Technology | Non-connected |
| Control Method | Touch |
| Control Type | Button Control |
| Controller Type | Hand Control |
| Customer Reviews | 4.3 out of 5 stars 7,751 Reviews |
| Display Type | Digital |
| Finish Types | White |
| Global Trade Identification Number | 00085267348553 |
| Included Components | Mounting Hardware, Thermostat, User Manual |
| Item Dimensions D x W x H | 1"D x 4.75"W x 3.5"H |
| Item Type Name | Programmable Thermostat |
| Manufacturer | Honeywell |
| Manufacturer Part Number | RTH221B |
| Manufacturer Warranty Description | 1 year limited. |
| Material Type | Plastic |
| Model Name | RTH221B |
| Model Number | RTH221B1039 |
| Mounting Type | Wall Mount |
| Number of Batteries | 2 AA batteries required. |
| Power Source | Battery Powered |
| Product Dimensions | 1"D x 4.75"W x 3.5"H |
| Product Style | Contemporary |
| Shape | Curved |
| Special Feature | Clock Display, Low Battery Indicator, Low Voltage, Programmable |
| Specific Uses For Product | Air Conditioner, Furnace |
| Specification Met | energy |
| Temperature Control Type | Heating and Cooling |
| UPC | 085267348553 |
| Voltage | 24 Volts |

## Product Details

- **Brand:** Honeywell Home
- **Controller Type:** Hand Control
- **Model Name:** RTH221B
- **Product Dimensions:** 1"D x 4.75"W x 3.5"H
- **Special Feature:** Clock Display, Low Battery Indicator, Low Voltage, Programmable

## Images

![Honeywell Home RTH221B1039 RTH221B Programmable Thermostat, White - Image 1](https://m.media-amazon.com/images/I/61czZlHOxkL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Questions & Answers

**Q: How did everyone else get the red wire in if it is so tightly screwed in? I can’t seem to get it to budge, even with the correct size screwdriver.**
A: I used a small flathead that fit in the slot. Then used pliers on the shaft of the screwdriver. I used the pliers to turn the screwdriver and I was able to loosen the screw

**Q: Where can I find an owners manual?**
A: Jeezus people, if the person is asking isn’t it obvious he does not have it in the box?!! The least helpful answers ever. I inherited the thermostat from a previous owner and in search for a manual, too. Guess what— no box!!

**Q: How do I put it on. I cannot program it**
A: Hi, thank you for reaching out with this. We would like to gather some more information on your specific system so that we can provide assistance on how to program. Please reach out to our support team on Facebook/Twitter with a private message. We look forward to hearing from you soon. -Jim

**Q: does this thermostat use a battery for power? and how long should the battery last if it needs one**
A: Hi there, this thermostat requires 2 AAA batteries, battery life depends on the usage, we recommend replacing batteries at least every year. - Maria

## Customer Reviews

### ⭐⭐⭐⭐⭐ Simple replacement for round Honeywell thermostats
*by H***B on August 7, 2012*

Replaced some old mercury 2-wire thermostats for my oil-fired furnace. No a/c. Wanted programable, but that was about it. These fit the bill. If you want each day to be individually programable, then you will need the more expensive model. This one is about half that price. This one is simple to set and simple to override if you want. Installation is easy. Remove old 'stat (note which wire was connected to which terminal, say red or white), feed the wires through the baseplate from the new thermostat and attach with the 2 included anchors and screws to the wall), and then screw the wires under the approriate set screw terminal locations that are labeled on the baseplate. For example red to red-heat (r-h), white to white. Add 2 AAA batteries (not included)to the thermostat cover and snap into place. Then program with time and set temperatures. I did four thermostats. The first one took about 25 minutes (most of the time making sure I knew which wire to hook to which terminal), the other 3 took about 10-15 minutes each. One other note. I found one degree of variation from other digital thermometers (if you check it against another one) but once set it is very stable. Update: Corrected battery size to 2-AAA. - Battery replacement is a snap ... less that 5 minutes each thermostat. Loosen the bottom set screw a couple turns (don't back out completely or you may loose it) and pull of cover from the bottom. Batteries are located in the cover and if you replace them right away you don't lose your settings. Reattach to base by setting the top first and then closing in the bottom, you can tighten the screw to hold in place. - There remains a difference between the temperature reported by the thermmostat and my other, professional indoor outdoor thermometer. These thermostats are off by about one to two degrees higher. When the actual temperature is 70F, these four read 71F or 72F. In other words, the actual temperature is about 1 to 2 degrees lower than what these thermostats show. - Two of my thermostats have the sensing thermocouples sealed (silicone?) to the inside of the cover. The other two are not sealed and I actually placed them so that they are outside the cover when installed. Doesn't seem to make a difference in performance. Still get the mismatch with actual temperature, but performance is stable. - The temporary and permanent hold features is are nice and easy to use ... particularly as a preventative measure to accomodate those family members you don't want messing around with the programing. - Would be nice if these lit up when a button is pressed. Would be much easier to read. Not a showstopper.

### ⭐⭐⭐⭐⭐ Inexpensive upgrade from old mercury switch thermostats
*by E***N on February 26, 2011*

I purchased this programmable thermostat to install in the portion of my two-family home that I live in. I also purchased the similar Honeywell RTH111B Vertical Digital Manual Thermostat NON-programmable model for the portion of my home that I rent out. Installation of both models is identical, and the main difference between the two is just the ability to set up a program of varying temperature changes based on your schedule. The non-programmable RTH111B has no clock feature. Just simple buttons to change the temperature up or down, and switches for a system fan (if applicable) and the HEAT-OFF-COOL selection. The programmable RTH221B gives you these same features, PLUS a 7-day, 4-event schedule to work with. In other words, every day of the week is treated the same and you can program in a time and temperature change for waking, leaving, returning, and sleeping. For people who desire to have a different schedule for the weekend, a 5/2 day programmable model would be a wiser choice. The apartment that received the RTH221B is a simple heat-only, oil-fired steam radiator system. The installation instructions were generally easy to follow, but I also found additional information on the Honeywell website explaining what each terminal actually was. It would have been useful for Honeywell to print this in the instructions. Summarized: Rh : Heating power supply Rc : Cooling power supply W : Heating signal Y : Cooling signal G : Fan Both of the two environmental systems in my home are ONLY heat, and have a two-wire connection. The wiring looked about a hundred years old, but still worked perfectly once I connected the wires to the Rh and W terminals. Interesting to note that in both installations it did not seem to make a difference which of the two wires went to what terminal, so long as it was Rh and W. However in a more complicated system that includes more wires for cooling or a fan, I'd use the included labels to mark each wire and be certain it was connected properly. Following the instructions, setting up a schedule for temperature changes was a simple process. Even if you ONLY wished to alter the temperature at night (rather than during the day while at work), it's a breeze because you'll just set the temperature the same for the "leave" and "return" events. Overall, setting the clock and programming took only a couple of minutes. I don't have any dollar amount savings to offer, but I can say that the temperature was MUCH more consistent in my apartment than it had been with the old round-style mercury switch which was prone to large temperature swings. There is no question in my mind that less fuel was used, and it's very likely that the two thermostats I purchased have already paid for themselves one month later.

### ⭐⭐⭐⭐ Simple to Use and Reliable — Perfect for Basic Temperature Control
*by D***R on October 8, 2025*

This thermostat does exactly what it’s meant to, keeps your home at a comfortable temperature without any complicated setup. Installation was quick and straightforward, even for someone who’s not super handy. The instructions were clear, and it powered right up once connected. The display is easy to read, and the programmable feature is great for setting different temps during the day and night. It’s not fancy or smart-home compatible, but that’s also what I like about it, fewer buttons, fewer issues. Once set, it keeps the temperature steady and accurate, and it’s easy to adjust when needed. If you’re looking for a no-frills, dependable thermostat that just works, this one’s a solid choice. Pro tip: double-check your wiring before installing, it makes the whole process even smoother.

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-06-05*