View the manual for the Honeywell DT90 here, for free. This manual comes under the category thermostat and has been rated by 29 people with an average of a 8.3. This manual is available in the following languages: English. Do you have a question about the Honeywell DT90 or do you need help? Ask your question here

The Honeywell DT90 is a thermostat that offers reliable temperature control for your home or office space. With an accuracy of 0.5 °C, it provides precise and consistent readings to ensure optimal comfort. The thermostat features a clear LCD display, making it easy to read and adjust the temperature as needed. Powered by two 230 V batteries, the Honeywell DT90 has a battery life of 2 years, minimizing the need for frequent battery replacements. Additionally, it comes with batteries included, saving you time and money. Although it does not have a memory function, it still offers effective temperature control for your space. Measuring 90 millimeters in width, 27 millimeters in depth, and 92 millimeters in height, the Honeywell DT90 is compact and can be easily mounted on your wall. Its sleek design seamlessly blends with any interior decor. While the Honeywell DT90 does not include a remote control, it can be manually adjusted on the thermostat itself. This simplicity may be preferred by some users who prefer a more hands-on approach. Overall, the Honeywell DT90 thermostat offers accurate temperature control with its clear LCD display. Its compact size and durable construction ensure reliability and longevity. The thermostat is an ideal choice for those seeking a straightforward and effective solution for maintaining a comfortable indoor environment.
| Brand | Honeywell |
| Model | DT90 | DT90 |
| Product | thermostats |
| EAN | 5025121386128 |
| Language | English |
| Filetype | User manual (PDF) |
| Accuracy | 0.5 °C |
| Temperature range (T-T) | 5 - 35 °C |
| Memory function | No |
| Product color | White |
| Display | LCD |
| Number of batteries supported | 2 |
| Battery voltage | 230 V |
| Battery life | 2 year(s) |
| Batteries included | Yes |
| Handheld remote control | No |
| Width | 90 mm |
| Depth | 27 mm |
| Height | 92 mm |
Can't find the answer to your question in the manual? You may find the answer to your question in the FAQs about the Honeywell DT90 below.
The best place for the thermostat is the room where you spend the most time, in many cases the living room or kitchen. Place the thermostat about one and a half metres above the floor, not in the sun and not on an outside wall.
If your thermostat has a dead band, your installation is, as it were, 'at rest'. The thermostat only switches on when, for example, the difference deviates more than 2˚C from the set room temperature.
Most people find that the ideal room temperature is between 19 and 22 degrees Celsius.
The Honeywell DT90 has a height of 92 mm.
The Honeywell DT90 has a width of 90 mm.
The Honeywell DT90 has a depth of 27 mm.
A temperature can be set by using the up and down arrow buttons on the thermostat to navigate to the desired temperature and pressing the select button to confirm.
Ensure that the thermostat is receiving power by checking the circuit breaker or fuse box. If the power supply is intact, consider checking the batteries in the thermostat and replace them if necessary.
To program specific heating times and temperature settings, navigate to the "Program" menu on the thermostat using the menu button. From there, you can set up different time and temperature periods based on your desired schedule.
Absolutely! By pressing the up or down arrow buttons on the thermostat, you can manually adjust the temperature to your preference. The override will be in effect until the next programmed temperature period starts.
By accessing the "Settings" menu on the thermostat, you can navigate to the "Lock" option. From there, you can enable the lock feature, which will require a passcode to make any changes to the thermostat settings or temperatures.
The accuracy of the Honeywell DT90 thermostat is 0.5 °C. This means that the temperature readings are precise up to 0.5 °C, providing accurate control of the heating or cooling system.
No, the Honeywell DT90 thermostat does not have a memory function. This means that it does not retain any programmed settings or temperature history, requiring the user to manually set the desired temperature each time.
The Honeywell DT90 thermostat has an LCD display. This provides clear and easy-to-read temperature information and settings, enhancing the user experience.
The Honeywell DT90 thermostat supports 2 batteries. This ensures reliable power supply for the thermostat, preventing any interruptions in temperature control.
Yes, the Honeywell DT90 thermostat comes with batteries included. This allows for immediate use and convenience, as the user does not need to purchase additional batteries separately.
Yes, the manual of the Honeywell DT90 is available in English .
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Number of questions: 29"I have changed the batteries of the thermostat, but it's not working with the new ones because the screen doesn't turn on. Do you have any solution?"
This message has been automatically translatedOur thermostat is intermittently sulking and although it looks like it’s working the rads get cold. Have tried new batteries and turning it on and iff
What does it mean if neither red nor green light is showing on the wireless relay. If the thermostat is working correctly shouldn’t the relay be showing a constant green light?
when i try to bond the DT90e on the second step witch is to move down from inst to count, why will it not let me scroll down? i cn go up and then down but not down to count. Can you help
If your portable thermostat says 5 and you don't know if the green Eco button was the last thing you pressed OR NOT and you keep trying the upward arrow to get the heat setting you want without success what can you do?
The ambient temperature is showing as 13 degrees when the actual room temp is much higher, the heating is set to reach 17 degrees but it still shows as 13. Can you help
Hi How do i get the DT90 to sync with my boiler as since changing the batteries i have lost this so i cant turn the heating on by turning up the temperature.
Hi, I have just purchased the DT 90 E stat to replace an old 3 wire stat, forgive me but which terminal should the third (load ) wire be connected to, at the moment I am blowing fuses or getting no reaction from the boiler as in no heat. I would appreciate any advice. Many thanks.
My DT90 all ways switch off half deg higher than set point is this normal? Thanks
Having successfully installed my DT90E, must I enter Installer Mode before I can use it operationally?