The Honeywell RTH9585WF thermostat offers smart home comfort control. But like any tech device, it can face issues. You can solve many common RTH9585WF problems with simple troubleshooting steps.
This guide will help you fix connection problems, display glitches, and heating/cooling inconsistencies. We’ll cover basic checks and advanced fixes for your WiFi-enabled thermostat.
Let’s explore how to get your Honeywell RTH9585WF working smoothly again. The table below outlines key features to help you understand this device better.
| Feature | Description |
|---|---|
| WiFi Connectivity | Links to Total Connect Comfort app |
| Color Touchscreen | Easy-to-read display |
| 7-Day Programming | Customize schedules for each day |
| Weather Forecast | Shows local weather on screen |
| Remote Access | Control from anywhere via smartphone |
Honeywell RTH9585WF Thermostat Troubleshooting Guide
The Honeywell RTH9585WF is a popular Wi-Fi smart thermostat with a color touchscreen. Like any smart device, it can run into issues—from Wi-Fi drops to incorrect temperature readings. Here’s how to troubleshoot effectively.
1. Thermostat Not Turning On
Possible Causes:
- No power from HVAC system
- Loose wiring
- Tripped breaker or blown fuse
Fix:
- Check that your HVAC system has power (reset breaker if needed).
- Ensure the C-wire (common wire) is connected properly.
- Remove the thermostat faceplate and re-seat it securely.
- If still dead, check your furnace/air handler fuse.
2. Wi-Fi Not Connecting / Keeps Dropping
Possible Causes:
- Wrong Wi-Fi password
- Router compatibility (2.4 GHz only, not 5 GHz)
- Weak signal
Fix:
- Confirm your Wi-Fi network is 2.4 GHz.
- Restart your router and thermostat.
- On thermostat: Menu → Wi-Fi Setup → Choose Network → Enter Password.
- Move router closer or use a Wi-Fi extender if signal is weak.
- If still failing, reset Wi-Fi: Menu → Wi-Fi Setup → Reset.
3. Incorrect Temperature Reading
Possible Causes:
- Thermostat in direct sunlight or near heat source
- Dust inside thermostat
- Calibration issue
Fix:
- Relocate thermostat away from heat/cold drafts if possible.
- Clean thermostat vents with compressed air.
- Recalibrate: Menu → Preferences → Temperature Display Offset (adjust by ±3°F).
4. Heating or Cooling Not Working
Possible Causes:
- Wrong system type selected during setup
- Incorrect wiring
- HVAC issue (not thermostat-related)
Fix:
- Check thermostat mode: Heat / Cool / Auto.
- Verify wiring matches your system (conventional vs. heat pump).
- Use the wiring diagram in the manual.
- Restart HVAC system (power cycle furnace/AC).
- If still not working, test system manually at the furnace to confirm if the issue is HVAC-related.
5. Touchscreen Not Responding
Possible Causes:
- Software glitch
- Frozen display
Fix:
- Press and hold the Weather + Fan buttons for 10 seconds → restart.
- If still frozen, remove thermostat from wall plate for 1 minute → reattach.
- If unresponsive, factory reset (see below).
6. Schedules or Settings Not Saving
Possible Causes:
- Incorrect schedule setup
- App/Cloud sync issue
Fix:
- On thermostat: Menu → Preferences → Scheduling Options → confirm settings.
- If using Honeywell Home app, log out and back in.
- Ensure Wi-Fi is stable for cloud syncing.
7. Factory Reset (Last Resort)
If nothing works, reset thermostat to factory defaults:
- Tap Menu → Preferences → Restore Factory Defaults.
- Reconnect Wi-Fi and redo setup.
✅ Quick Troubleshooting Checklist
- 🔌 Thermostat won’t turn on → Check power, breaker, C-wire
- 📶 Wi-Fi issues → Use 2.4 GHz, reset Wi-Fi, restart router
- 🌡 Wrong temp reading → Clean vents, adjust offset
- ❄️ No heating/cooling → Verify wiring & system type
- 🖐 Touchscreen frozen → Restart or factory reset
👉 For detailed wiring diagrams and advanced setup, see the official Honeywell RTH9585WF User Manual or Honeywell’s support page.
Initial Setup and Installation
Setting up your RTH9585WF thermostat involves a few key steps. You’ll need to unpack and install the device, connect it to your Wi-Fi network, and register it online for full functionality.
Unpacking and Installing the RTH9585WF
Start by carefully unpacking your RTH9585WF Smart Color Thermostat. The box contains the thermostat unit, wallplate, wire labels, and user guide.
Before installation, turn off power to your heating and cooling system at the circuit breaker. Remove your old thermostat, keeping the wires connected to the wall.
Label each wire using the provided stickers. This step is crucial for proper connection later.
Mount the wallplate to the wall, ensuring it’s level. Thread the labeled wires through the center opening.
Connect the wires to the appropriate terminals on the wallplate. Refer to the user manual for a detailed wiring diagram.
Snap the thermostat onto the wallplate. Turn the power back on at the circuit breaker.
Connecting to Wi-Fi
After powering on, your thermostat will prompt you to set up Wi-Fi. Touch “Yes” to begin the process.
The device will scan for available networks. Select your home Wi-Fi network from the list.
Enter your Wi-Fi password using the on-screen keyboard. Double-check for accuracy to avoid connection issues.
Once connected, your thermostat will display a confirmation message. It may also check for and install any available firmware updates.
Registering the Thermostat
To access remote control features, you need to register your thermostat online. Look for the Thermostat MAC and CRC on the device’s screen or packaging.
Visit the Honeywell Home website and create an account if you don’t have one. Choose “Add Device” and select your thermostat model.
Enter the MAC address and CRC when prompted. Follow the on-screen instructions to complete the registration process.
Once registered, you can control your thermostat remotely via the Honeywell Home app or website. This allows you to adjust settings, create schedules, and monitor your home’s temperature from anywhere.
| Setup Step | Key Points |
|---|---|
| Installation | Turn off power, label wires, mount wallplate, connect wires |
| Wi-Fi Setup | Select network, enter password, wait for confirmation |
| Registration | Find MAC/CRC, create account, add device online |
Programming and Configuration
The Honeywell RTH9585WF smart thermostat offers several customization options. You can set schedules, adjust system settings, use Smart Response Technology, and set up alerts to maximize comfort and efficiency.
Creating and Editing Schedules
You can create and edit schedules on your RTH9585WF thermostat to automate temperature changes. To set up a schedule:
- Tap the Menu icon on the home screen
- Select “Create/Edit Schedule”
- Choose the days you want to program
- Set wake, leave, return, and sleep times and temperatures
You can create multiple schedules for different days of the week. The thermostat allows for up to 4 time periods per day. Adjust your schedule as needed to match your routine and preferences.
Adjusting System Settings
To optimize your HVAC system’s performance, you can adjust various settings on the RTH9585WF:
- Fan Mode: Auto, On, or Circulate
- System Mode: Heat, Cool, Auto, Off, or Em Heat
- Temperature Units: Fahrenheit or Celsius
- Humidity Control: Set target humidity levels
Access these options through the Menu > System Settings. Experiment with different settings to find the ideal balance of comfort and energy efficiency for your home.
Using Smart Response Technology
Smart Response Technology learns your home’s heating and cooling patterns. It adjusts the start times of your programmed schedule to ensure your desired temperature is reached at the set time.
To enable Smart Response:
- Go to Menu > Preferences
- Select “Smart Response”
- Toggle the feature on or off
This feature can help you save energy while maintaining comfort. It may take several days for the thermostat to learn your home’s thermal characteristics.
Setting Up Alerts and Notifications
The RTH9585WF can send alerts via email to keep you informed about your HVAC system. To set up alerts:
- Ensure your thermostat is connected to Wi-Fi
- Register your device on the Honeywell Home app or website
- Go to Menu > Preferences > Alerts and Reminders
- Choose which alerts you want to receive
Common alerts include:
- Extreme temperature warnings
- Filter change reminders
- Humidity level alerts
- System malfunction notifications
Customize these alerts to stay on top of your home’s climate control needs and potential issues.
Troubleshooting and Maintenance
The Honeywell RTH9585WF thermostat may encounter issues with its display, Wi-Fi connection, or heating/cooling system. Proper troubleshooting and maintenance can help resolve these problems quickly.
Resolving Display Issues
Check the power supply if your thermostat screen goes blank. Ensure the circuit breaker is on and reset if needed. Verify the C wire is connected properly. If the display shows error messages, consult the user manual for specific codes.
Clean the screen gently with a soft, dry cloth to remove smudges. Avoid using harsh chemicals or water. Adjust screen brightness in the settings menu for optimal visibility.
For unresponsive touchscreens, try a system restart. Press and hold the center of the display for about 5 seconds until it goes blank, then release.
Handling Wi-Fi Connectivity Problems
Check your home network if the thermostat loses Wi-Fi connection. Ensure your router is working and the signal is strong near the device. Try reconnecting to Wi-Fi through the thermostat menu.
If connection issues persist, reset the Wi-Fi module. Go to Menu > Wi-Fi Setup and select “Disconnect Wi-Fi”. Then reconnect following the on-screen instructions.
Update the thermostat firmware regularly. Enable automatic upgrades to ensure you have the latest features and bug fixes.
Managing Heating/Cooling System Errors
Verify your HVAC system is powered on and the furnace door is closed securely. Check for tripped circuit breakers or blown fuses.
If the system doesn’t respond to temperature changes, ensure the thermostat is set to the correct mode (Heat/Cool/Auto). Check your temperature settings are appropriate for the current season.
Clean or replace air filters regularly to maintain system efficiency. Schedule annual professional maintenance for your heating and cooling equipment.
| Common Issue | Quick Fix |
|---|---|
| Blank Display | Check power supply and C wire |
| Wi-Fi Disconnection | Restart router and reconnect |
| Unresponsive System | Verify mode settings and power |
| Inaccurate Temperature | Calibrate sensor in settings |
For persistent issues, consult the troubleshooting section of your user manual or contact Honeywell support for assistance.
Advanced Usage and Features
The Honeywell RTH9585WF thermostat offers sophisticated capabilities for enhanced home climate control. Users can access the device remotely, customize its interface, and utilize commercial features for business settings.
Remote Access via Mobile App and Web
The RTH9585WF thermostat allows you to control your home’s temperature from anywhere. Download the Honeywell Home app on your smartphone or tablet. Create an account and link your thermostat.
You can adjust temperature settings, view energy reports, and receive alerts. The web portal offers similar functionality. Log in to make changes or check your HVAC system status.
Remote access helps you save energy. Forgot to adjust the temperature before leaving? No problem. Use the app to modify settings on the go.
Personalizing the Color Touchscreen
The RTH9585WF features a customizable color touchscreen. Navigate to the Settings menu on your thermostat. Select “Screen” to access display options.
You can change:
- Background color
- Text color
- Brightness
- Idle screen information
Choose colors that match your home decor or improve visibility. Adjust brightness for different lighting conditions. Select which information appears when the screen is idle.
Create up to four daily program periods. Name them according to your schedule (e.g., “Wake”, “Leave”, “Return”, “Sleep”). This personalization makes the thermostat more intuitive to use.
Accessing Utilisation Commerciale
The RTH9585WF offers commercial features for business settings. These options provide more control over temperature changes and energy usage.
To access commercial settings:
- Press Menu
- Select “Preferences”
- Choose “Advanced Preferences”
- Enter the password (default: 1234)
Commercial features include:
- Keypad lockout
- Temperature limits
- Scheduling restrictions
- Override time limits
| Feature | Residential | Commercial |
|---|---|---|
| Program periods | 4 per day | Up to 2 per day |
| Temperature override | Unlimited | Time-limited |
| Keypad lock | Basic | Advanced options |
These settings help businesses maintain consistent temperatures and reduce unauthorized adjustments. Consult the user manual for detailed instructions on configuring commercial features.
Frequently Asked Questions
Honeywell RTH9585WF thermostats may experience various issues. Here are common problems and solutions to help you troubleshoot your device efficiently.
What are the troubleshooting codes for Honeywell RTH9585WF?
The RTH9585WF displays error codes to indicate specific problems. Common codes include E1 (heat pump failure), E2 (AC system error), and E3 (furnace malfunction). Check your user manual for a complete list of codes and their meanings.
How can I fix an unresponsive display on my Honeywell thermostat?
An unresponsive display often stems from power issues. First, check if the circuit breaker is on. Ensure the furnace door is closed properly. If these don’t work, try removing the thermostat from its base and reinstalling it.
What steps should I take if my old Honeywell thermostat is not functioning properly?
Start by replacing the batteries if your model uses them. Clean any dust or debris from the interior. Check wire connections for loose or corroded wires. If problems persist, you may need to reset the thermostat or consult a professional.
What does it mean when my Honeywell thermostat does not initiate heating?
Several factors can prevent heating initiation. Verify your thermostat is set to “Heat” mode. Check if the set temperature is higher than the room temperature. Ensure your furnace is receiving power and the pilot light is lit if applicable.
How can I reset a Honeywell thermostat that has non-responsive buttons?
To reset a thermostat with unresponsive buttons, turn off power at the circuit breaker for 30 seconds. If that doesn’t work, remove the thermostat from the wall plate for a few minutes, then reattach it. Some models have a reset button you can press with a paperclip.
What are the indications that a Honeywell thermostat needs to be replaced?
Signs you may need a new thermostat include frequent temperature swings, inaccurate readings, or an outdated model lacking modern features. If your HVAC system short cycles or the thermostat is over 10 years old, replacement might be beneficial.
| Issue | Possible Solution |
|---|---|
| Unresponsive display | Check power, reset device |
| Heating not starting | Verify settings, check furnace |
| Error codes | Consult manual for specific code |
| Old thermostat issues | Replace batteries, clean interior |
| Non-responsive buttons | Power cycle or reset device |
| Need for replacement | Consider age and performance |
