View the manual for the Honeywell RTH8500D here, for free. This manual comes under the category thermostat and has been rated by 8 people with an average of a 7.7. This manual is available in the following languages: English. Do you have a question about the Honeywell RTH8500D or do you need help? Ask your question here

The Honeywell RTH8500D is a thermostat designed to provide precise temperature control for residential heating and cooling systems. This thermostat features a large touchscreen display, making it easy to read and navigate through the various settings and options. With its backlit display, it can be easily viewed in any lighting condition. One of the notable features of the RTH8500D is its programmable functionality, allowing users to create custom schedules for different days of the week. This enables homeowners to optimize energy usage by automatically adjusting the temperature when they are away or asleep, resulting in potential energy savings. The thermostat also offers precise temperature control with its +/- 1-degree Fahrenheit accuracy, ensuring the temperature you set is maintained throughout your home. Furthermore, it has a built-in memory that retains user-programmed settings during power outages, preventing the need for reprogramming. Installation of the RTH8500D is made simple with its effortless compatibility with a wide range of heating and cooling systems, including single-stage and multi-stage systems. This thermostat also has the ability to automatically switch between heating and cooling modes based on the user's preferences. In terms of design, the RTH8500D features a sleek and modern look that seamlessly fits into any home decor. Its intuitive interface and user-friendly controls make it easy for homeowners to customize their indoor comfort. Overall, the Honeywell RTH8500D offers a reliable and user-friendly solution for managing the temperature in your home, providing both comfort and potential energy savings.
| Brand | Honeywell |
| Model | RTH8500D | RTH8500D |
| Product | thermostats |
| Language | English |
| Filetype | User manual (PDF) |
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 RTH8500D 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.
Press the "Program" button on the thermostat, then use the arrow keys to select the desired time period. Set the temperature using the "+" and "-" buttons, and press "Set" to confirm.
Ensure that the thermostat is set to the correct mode (Heat or Cool) and that the desired temperature is higher/lower than the current room temperature, depending on the season.
Press the "Menu" button and navigate to the "Display" submenu. Use the arrow keys to find the "Backlight" option and adjust the brightness level as desired.
Certainly! Press the "Program" button, select the desired time period, and set the temperature for the "Away" mode. Repeat this for each time period you want to customize.
Gently pull off the thermostat's front cover and locate the battery compartment. Remove the old batteries and insert new ones, paying attention to the correct polarity (+/-). Replace the front cover securely.
Yes, the manual of the Honeywell RTH8500D is available in English .
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Number of questions: 15How can I lower the temperature inside? I know it's kind of a silly question, but since last night it hasn't gone below 84 and it's not working properly.
How do I brighten my screen? It sais to press the display but where is that?
Sold my home. How do I unregistered this thermostat so the new owners can control it on their phone?
Why won’t my system cool below 70 degrees? How do I change that internal limit on my rth8500?
My temp setting won't allow anything lower than 70. What the heck?
Cómo bajar la temperatura inside?
How do I change heat pump cut off point to 40 degrees
My thermostat says wait and unit won’t come on ?
I lost my manual. Rather than printing off the manual, could a new manual be sent to me?
How do I delete the scheduled settings