Honeywell thermostat error codes [FIXED]

Honeywell thermostat error codes can be a frustrating interruption in maintaining your home’s comfort, but understanding their causes and solutions can help you regain control over your indoor climate. These error codes typically arise from issues such as wiring faults, sensor malfunctions, or software glitches, which can bewilder many users. However, by taking a systematic approach, you can address these issues effectively.

To resolve the error codes, begin by consulting your Honeywell thermostat’s user manual, as it provides crucial information on specific error messages and troubleshooting steps. Common solutions include checking for loose or damaged wiring, which could disrupt the power supply to the unit, or resetting the thermostat, which refreshes its settings and can clear transient errors. Additionally, ensure that the batteries are functioning properly, especially for wireless models, and keep the device’s software up to date to minimize the chances of glitches.

Don’t allow Honeywell thermostat error codes to leave you feeling powerless; proactively addressing these concerns can restore your home’s warmth and comfort swiftly. For persistent issues, contacting Honeywell customer support or a qualified HVAC technician may be necessary for expert assistance. Taking prompt action can ensure a reliably cozy environment in your home.

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

Next Steps

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.