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 designed for precise temperature control in homes and offices. With an accuracy of 0.5 °C, it ensures that the temperature set by the user is maintained within a half-degree range. The thermostat has an LCD display that shows the current temperature and the desired temperature. It is powered by two 230 V batteries, which are included in the package. The battery life is expected to last for up to two years. The Honeywell DT90 has a width of 90 millimeters, a depth of 27 millimeters, and a height of 92 millimeters. It is a compact device that can be installed on walls or placed on countertops. The thermostat does not have a memory function, which means that it cannot store the user's preferred temperature settings in case of a power outage. The Honeywell DT90 is a simple and straightforward thermostat that does not require remote control. It is suitable for people who want to manually adjust the temperature in their homes or offices. The thermostat is made from high-quality materials that ensure durability and reliability over time. It is a cost-effective solution for controlling the temperature in small to medium-sized spaces.
| Brand | Honeywell |
| Model | DT90 | DT90 |
| Product | thermostats |
| EAN | 5025121386128 |
| Language | English |
| Filetype | Manual (PDF) |
| Accuracy | 0.5 °C |
| Temperature range (T-T) | 5 - 35 °C |
| Memory function | No |
| Product colour | White |
| Display | LCD |
| Number of batteries supported | 2 |
| Battery voltage | 230 V |
| Battery life | 2 year(s) |
| Batteries included | Yes |
| Remote control included | 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, go to the "Program" menu on the thermostat using the menu button. From there, you can configure different time and temperature periods according to your preferred 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 Honeywell DT90 thermostat has an accuracy of 0.5 °C. This implies that the temperature readings are precise up to 0.5 °C, allowing for 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 a 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 buy extra batteries separately.
Yes, the manual of the Honeywell DT90 is available in English .
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Number of questions: 24Does it display the room temperature as the same temperature that I set for the boiler to start, and does it not show the actual temperature in the room at that moment? In other words, does it display the temperature that I have chosen to start the boiler when it is at rest?
This message has been automatically translatedMy thermostat, the DT90, says it is 28°C inside the house but it is actually 19°C. What should I do? Is it adjustable?
This message has been automatically translatedWhich two terminals of 1, 2 and 3 at the Honeywell Wiring Centre correspond to the A and B terminals of the DT90 please?
I have a DT92A and I don't know how to make the settings so that the central heating starts less frequently.
DT90 thermostat, the screen has turned off for me, I change the batteries and it remains off, however, the heating works. How can it be fixed? Thank you.
How do you connect the thermostat to your heating system? It can find YouTube instructions for the 92 model, but not for the 90 model.
"I have changed the batteries of the thermostat, but it is not working with the new ones. The screen doesn't turn on. Any solution?"
This message has been automatically translatedHello, how do I connect the cables of the Honeywell DT90A? Could someone help me? Thank you.
Just installed the Honeywell digital room thermostat. The installer said that you use the up button to insert temp. So I inserted 24 degrees . Then the display showed the room temp at 19 degrees and it didn’t go up to 24 degrees for 6 hours. We were freezing. What is wrong. Why so long for display to change . .