Honeywell thermostat error codes often appear when you least expect them, leaving you in the lurch when controlling your home’s temperature.
But why do these errors happen? They can occur for various reasons, including wiring issues, sensor malfunctions, or even software glitches. Understanding the root cause can be perplexing for the average user.
However, fear not, as there are solutions available.
To tackle this issue effectively, consult the thermostat’s manual, check for loose wires, or consider resetting the device.
Don’t let these error codes leave you cold; take action and regain control of your home’s comfort.
Some common Honeywell thermostat error codes
| Error Code | Meaning | Fix |
| 11n | Equipment detection error. | Check for faulty wiring or a malfunctioning thermostat or equipment. Contact an HVAC technician if needed. |
| 53 | Defective outdoor sensor. | Inspect wiring and sensor; replace the sensor if necessary. |
| E1 33 | AC power loss, battery replacement needed. | Replace the thermostat’s batteries. Check for power from the furnace. |
| 89 | Equipment connection issue. | Trace and repair broken sensor wires to the A/C or furnace. |
| 40 | High Pressure Fault or equipment issues. | Check for airflow obstruction, refrigerant issues, or motor problems. |
| baelo | Battery low. | Ensure correct battery insertion, clean contact points, and use good batteries. |
| 177 | Indoor Temperature Sensor Faulty. | Verify the indoor temperature sensor‘s wiring and connections. |
| e02 | Wi-Fi password error. | Ensure the correct Wi-Fi password is entered during setup. |
Honeywell thermostat error code list
Honeywell Lyric™ T5 Wi-Fi (RCHT8612WF/RCHT9510WFW)
| Error Code | Meaning | Fix |
| 164 | Heat pump needs service. | Call Climate Control Service Experts at 251-202-7503 for help. |
| 168 | Wi-Fi radio error. | Call Lyric technical support at 800-633-3991. |
| 170 | Internal memory error. | Call Lyric technical support at 800-633-3991. |
| 171 | Set date and time. | Finalize these settings so scheduling can occur. |
| 173 | Thermostat temperature sensor error. | Reach Lyric technical support at 800-633-3991. |
| 175 | AC power restored. | No action needed. |
| 181/182 | Put in a new air filter. | Clear the monitor by touching “dismiss” after putting in a clean filter. |
| 184 | Replace humidifier pad. | Clear the display by touching “dismiss” after installing a fresh pad filter. |
| 185 | Put in a new dehumidifier filter. | Clear the display by touching “dismiss” after adding a fresh filter. |
| 187 | Wash or put in a new ventilator filter. | Clear the monitor by tapping “dismiss” after adding a clean filter. |
| 188/189 | Install a new UV bulb. | Ring Climate Control Service Experts at 251-202-7503 for help. |
| 210 | Register online for outdoor temperature. | Use the Lyric app to complete this step and ensure correct thermostat operation. |
| 388 | Register online for remote access and exterior temperature. | Get the Lyric app to finish this step and ensure correct thermostat operation. |
| 399 | No Internet. | Confirm your network settings. |
| 400 | No Wi-Fi signal. | Wait for the thermostat to reconnect or choose a new Wi-Fi network. |
| 508 | Wi-Fi not set. | Get the Lyric app and follow the process to configure your thermostat. |
Honeywell T6 Pro Smart Programmable Thermostat (TH411OU2005)
| Error Code | Meaning | Fix |
| 164 | Heat pump requires service. | Contact Climate Control Service Experts at 251-202-7503 for assistance. |
| 168 | Wi-Fi radio error. | Contact Climate Control Service Experts at 251-202-7503 for help. |
| 170 | Internal memory error. | Reach Climate Control Service Experts at 251-202-7503 for assistance. |
| 171 | Set date and time. | Finish these settings so scheduling can run. |
| 173 | Thermostat temperature sensor error. | Reach Climate Control Service Experts at 251-202-7503 for support. |
| 175 | AC power resumed. | No action necessary. |
| 177 | Indoor temperature sensor error. | Reach Climate Control Service Experts at 251-202-7503 for support. |
| 178 | Outdoor temperature sensor error. | Contact Climate Control Service Experts at 251-202-7503 for assistance. |
| 181/182 | Replace air filter. | Clear the thermostat by tapping “dismiss” after adding a new filter. |
| 183 | Clean humidifier tank and install a new water filter. | Clear the monitor by tapping “dismiss” after completing these tasks. |
| 184 | Get a new humidifier pad. | Clear the display by hitting “dismiss” after adding a new pad filter. |
| 185 | Replace dehumidifier filter. | Clear the display by tapping “dismiss” after putting in a fresh filter. |
| 186 | Rinse ventilator core. | Clear the monitor by hitting “dismiss” after finishing this task. |
| 187 | Rinse or replace ventilator filter. | Clear the monitor by hitting “dismiss” after installing a new filter. |
| 188/189 | Replace UV bulb. | Reach Climate Control Service Experts at 251-202-7503 for support. |
| 210 | Register online for outdoor temperature. | Download the Lyric app to complete this step and ensure correct thermostat operation. |
| 388 | Register online for remote access and exterior temperature. | Use the Lyric app to finish this step and ensure accurate thermostat operation. |
| 399 | No Internet. | Verify your network settings. |
| 400 | No Wi-Fi signal. | Wait for the thermostat to reconnect or pick a new Wi-Fi network. |
| 508 | Wi-Fi not connected. | Download the Lyric app and follow the procedures to connect your thermostat. |
Honeywell Thermostat (Common Error Codes)
| Error Code | Meaning | Fix |
| 54 | Error in the Thermostat Humidity Sensor. | Contact the installer or HVAC professional. |
| 252 | AC Power Lost (Z-Wave models). | Restore the connection to prevent battery drainage. |
| 400 | No Wi-Fi Signal. | Wait for the thermostat to reconnect or choose a new network. |
| 407 | Battery Low. | Replace the batteries. |
| 508 | Wi-Fi Connection is Not Yet Configured. | Download the app and configure Wi-Fi. |
Honeywell Thermostat (Common Error Codes)
| Error Code | Meaning | Fix |
| 54 | Error in the Thermostat Humidity Sensor. | Contact the installer or HVAC professional. |
| 252 | AC Power Lost (Z-Wave models). | Restore the connection to prevent battery drainage. |
| 400 | No Wi-Fi Signal. | Wait for the thermostat to reconnect or choose a new network. |
| 407 | Battery Low. | Replace the batteries. |
| 508 | Wi-Fi Connection is Not Yet Configured. | Download the app and configure Wi-Fi. |
| 546 | Z-Wave Not Configured (Z-Wave models). | Enroll the thermostat to your Z-Wave network. |
| 547 | Z-Wave Radio Malfunction (Z-Wave models). | Contact an installer or HVAC professional to replace the thermostat. |
| E01 | Wi-Fi Setup Error. | Ensure the router is connected and within signal range. |
| E02 | Invalid Wi-Fi password. | Enter the correct Wi-Fi password or change it. |
| E42 | IP address Issue. | Check the Wi-Fi router’s IP assigning feature. |
| E43 | Problem communicating with Total Connect Comfort App. | Check your internet connection. |
| E99 | General error. | Reconnect the thermostat after several minutes. |
How do I fix my Honeywell thermostat sensor error?
Step 1: Identify the Error Code
The first step in fixing a Honeywell thermostat sensor error is to identify the specific error code displayed on your thermostat.
These codes can vary, so take note of the exact code or message to proceed accurately.
Step 2: Check for Loose Wires
Inspect the wiring connections to ensure they are securely attached.
A loose or disconnected wire can often be the culprit behind sensor errors. Safely turn off the power to your thermostat before inspecting the wires.
Step 3: Clean the Sensor
Dust or debris on the sensor can lead to inaccuracies and errors. Carefully clean the sensor using a soft, dry cloth or a can of compressed air.
Avoid using liquids or abrasive materials that could damage the sensor.
Step 4: Reset the Thermostat
Many sensor errors can be resolved by performing a thermostat reset. Consult your thermostat’s manual for instructions on how to initiate a reset.
Typically, this involves pressing specific buttons or accessing the settings menu.
Step 5: Update Firmware (If Applicable).
If your Honeywell thermostat has updatable firmware, consider checking for available updates. Outdated software can sometimes lead to sensor errors.
Follow the manufacturer’s instructions for firmware updates.
Step 6: Contact Honeywell Support
If the error persists after attempting the above steps, contacting Honeywell’s customer support or consulting a professional technician may be necessary.
They can provide further guidance and assistance in diagnosing and resolving the sensor error.
Step 7: Regular Maintenance
To prevent future sensor errors, establish a routine maintenance schedule.
Clean the sensor periodically, check for loose wires, and keep your thermostat’s software up to date as the manufacturer recommends.
Frequently Asked Questions for Reset Honeywell Thermostat error codes
Why does my Honeywell thermostat show a sensor error?
Sensor errors can occur due to loose wires, sensor dirt, software glitches, or other issues affecting the thermostat’s ability to measure temperature accurately.
How can I identify a sensor error on my Honeywell thermostat?
Sensor errors are usually indicated by specific error codes or messages displayed on the thermostat’s screen.
What should I do if my Honeywell thermostat displays a sensor error?
Start by checking for loose wires, cleaning the sensor, and resetting the thermostat. Follow the troubleshooting steps in your thermostat’s manual.
How do I clean the sensor on my Honeywell thermostat?
Use a soft, dry cloth or compressed air to clean the sensor gently. Avoid using liquids or abrasive materials that could damage it.
Where can I find firmware updates for my Honeywell thermostat?
Check Honeywell’s official website or contact their customer support for information on available firmware updates.
Wrapping up
In conclusion, while encountering Honeywell thermostat error codes can indeed be frustrating, it’s essential to approach them with patience and a systematic troubleshooting mindset.
These errors are not uncommon and can stem from various underlying issues. The key is not to let frustration cloud your judgment.
By referring to the thermostat’s manual, inspecting wiring connections, or performing a reset, you can often resolve the problem and regain the functionality of your thermostat.
Remember that addressing these issues promptly ensures your home remains comfortable and your heating and cooling systems operate efficiently.
So, don’t let thermostat error codes deter you; tackle them head-on and enjoy a comfortable living space once more.