Gosund
Gosund Smart Thermostats Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
Advertisements
E01
Thermostat display shows E01 and cannot connect to home Wi‑Fi network
Wi‑Fi Module Communication Failure
E02
Thermostat shows E02 and cannot connect to Gosund cloud or mobile app, even though Wi‑Fi signal is strong
Cloud Service / TLS Handshake Failure
E03
E03 displayed and thermostat shows room temperature as “--” or extremely high/low values
Internal Ambient Temperature Sensor Failure
E04
E04 error and thermostat cannot read floor sensor temperature in floor‑heating mode
External Floor Temperature Sensor Circuit Fault
E05
E05 displayed and thermostat will not turn on heating or cooling; internal safety lockout active
HVAC Output Relay Overcurrent / Short Detection
E06
E06 error and thermostat reboots or freezes frequently when calling for heat or cool
Low Voltage / Power Supply Instability
E07
E07 displayed and thermostat cannot detect any HVAC system (no R/C voltage sensed)
R/C Line Detection Failure
E08
E08 error and thermostat reports humidity as “--” or 0%/99% constantly
Internal Humidity Sensor Failure
E09
E09 displayed and thermostat touchscreen or buttons do not respond correctly
Touch Interface / Keypad Failure
E10
E10 error and thermostat cannot pair with Gosund app via Bluetooth or AP mode
Local Pairing / Provisioning Module Failure
E11
E11 displayed and thermostat cannot control heat pump reversing valve (no change between heat and cool)
O/B Reversing Valve Output Fault
E12
E12 error and thermostat cannot control fan independently; fan runs only with heat/cool or not at all
G Fan Output Fault
E13
E13 displayed and thermostat schedules or settings keep resetting unexpectedly
Non‑Volatile Memory / EEPROM Error
E14
E14 error and thermostat shows incorrect time or cannot maintain time after power loss
Real‑Time Clock (RTC) / Time Sync Failure
E15
E15 displayed and thermostat overheats or becomes very warm to the touch, then shuts down
Internal Over‑Temperature Protection
E16
E16 error and thermostat cannot drive auxiliary/emergency heat on a heat pump system
Aux/E Heat Output Fault
E17
E17 displayed and thermostat cannot detect or control external dehumidifier/humidifier accessory
Accessory Control Port Failure
E18
E18 error and thermostat cannot connect to voice assistants (Alexa/Google) despite being online
Third‑Party Integration / API Token Failure
E19
E19 displayed and thermostat cannot complete firmware update; stuck in update mode
Firmware Update / Bootloader Error
Symptom
Thermostat backlight or display is very dim or flickers
Display Backlight Power Issue
Symptom
Thermostat buttons or parts of the touchscreen do not respond in certain areas
Partial Touch/Keypad Failure
Symptom
Thermostat cycles heating or cooling on and off very frequently (short cycling)
Improper Cycle Rate / Differential Setting
Symptom
Thermostat does not follow programmed schedule; stays at one temperature
Scheduling / Program Execution Fault
Symptom
Thermostat emits a buzzing or humming noise, especially when calling for heat or cool
Relay or Transformer Noise
Symptom
Thermostat fails to detect or use external room sensor (if model supports remote sensors)
External Room Sensor Detection Failure
Symptom
Thermostat frequently disconnects from Wi‑Fi or shows offline in Gosund app
Intermittent Wi‑Fi Connectivity
Symptom
Thermostat has power but will not turn on cooling when room is above setpoint
No Cool Call from Thermostat
Symptom
Thermostat has power but will not turn on heating when room is below setpoint
No Heat Call from Thermostat
Symptom
Thermostat language or units (°C/°F) cannot be changed or revert after reboot
Configuration Storage / UI Setting Fault
Symptom
Thermostat plastic housing is discolored, warped, or has a burnt smell
Overheating / Component Burnout
Symptom
Thermostat randomly reboots or restarts several times a day
Unstable Power or Firmware Crash
Symptom
Thermostat screen is completely blank and HVAC system does not respond
No Power to Thermostat
Symptom
Thermostat shows correct mode but HVAC equipment runs continuously and does not shut off at setpoint
Stuck Relay or Incorrect Differential
Symptom
Thermostat shows humidity but does not control dehumidification or humidification as configured
Humidity Control Logic / Accessory Misconfiguration
Symptom
Thermostat shows strong Wi‑Fi signal but app commands (change setpoint, mode) are delayed or not applied
Cloud Command Latency / Sync Issue
Symptom
Thermostat temperature reading is consistently higher or lower than actual room temperature
Temperature Calibration / Sensor Drift
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E01 |
Thermostat display shows E01 and cannot connect to home Wi‑Fi network
|
Wi‑Fi Module Communication Failure | View Details |
| E02 |
Thermostat shows E02 and cannot connect to Gosund cloud or mobile app, even though Wi‑Fi signal is strong
|
Cloud Service / TLS Handshake Failure | View Details |
| E03 |
E03 displayed and thermostat shows room temperature as “--” or extremely high/low values
|
Internal Ambient Temperature Sensor Failure | View Details |
| E04 |
E04 error and thermostat cannot read floor sensor temperature in floor‑heating mode
|
External Floor Temperature Sensor Circuit Fault | View Details |
| E05 |
E05 displayed and thermostat will not turn on heating or cooling; internal safety lockout active
|
HVAC Output Relay Overcurrent / Short Detection | View Details |
| E06 |
E06 error and thermostat reboots or freezes frequently when calling for heat or cool
|
Low Voltage / Power Supply Instability | View Details |
| E07 |
E07 displayed and thermostat cannot detect any HVAC system (no R/C voltage sensed)
|
R/C Line Detection Failure | View Details |
| E08 |
E08 error and thermostat reports humidity as “--” or 0%/99% constantly
|
Internal Humidity Sensor Failure | View Details |
| E09 |
E09 displayed and thermostat touchscreen or buttons do not respond correctly
|
Touch Interface / Keypad Failure | View Details |
| E10 |
E10 error and thermostat cannot pair with Gosund app via Bluetooth or AP mode
|
Local Pairing / Provisioning Module Failure | View Details |
| E11 |
E11 displayed and thermostat cannot control heat pump reversing valve (no change between heat and cool)
|
O/B Reversing Valve Output Fault | View Details |
| E12 |
E12 error and thermostat cannot control fan independently; fan runs only with heat/cool or not at all
|
G Fan Output Fault | View Details |
| E13 |
E13 displayed and thermostat schedules or settings keep resetting unexpectedly
|
Non‑Volatile Memory / EEPROM Error | View Details |
| E14 |
E14 error and thermostat shows incorrect time or cannot maintain time after power loss
|
Real‑Time Clock (RTC) / Time Sync Failure | View Details |
| E15 |
E15 displayed and thermostat overheats or becomes very warm to the touch, then shuts down
|
Internal Over‑Temperature Protection | View Details |
| E16 |
E16 error and thermostat cannot drive auxiliary/emergency heat on a heat pump system
|
Aux/E Heat Output Fault | View Details |
| E17 |
E17 displayed and thermostat cannot detect or control external dehumidifier/humidifier accessory
|
Accessory Control Port Failure | View Details |
| E18 |
E18 error and thermostat cannot connect to voice assistants (Alexa/Google) despite being online
|
Third‑Party Integration / API Token Failure | View Details |
| E19 |
E19 displayed and thermostat cannot complete firmware update; stuck in update mode
|
Firmware Update / Bootloader Error | View Details |
| – |
Thermostat backlight or display is very dim or flickers
|
Display Backlight Power Issue | View Details |
| – |
Thermostat buttons or parts of the touchscreen do not respond in certain areas
|
Partial Touch/Keypad Failure | View Details |
| – |
Thermostat cycles heating or cooling on and off very frequently (short cycling)
|
Improper Cycle Rate / Differential Setting | View Details |
| – |
Thermostat does not follow programmed schedule; stays at one temperature
|
Scheduling / Program Execution Fault | View Details |
| – |
Thermostat emits a buzzing or humming noise, especially when calling for heat or cool
|
Relay or Transformer Noise | View Details |
| – |
Thermostat fails to detect or use external room sensor (if model supports remote sensors)
|
External Room Sensor Detection Failure | View Details |
| – |
Thermostat frequently disconnects from Wi‑Fi or shows offline in Gosund app
|
Intermittent Wi‑Fi Connectivity | View Details |
| – |
Thermostat has power but will not turn on cooling when room is above setpoint
|
No Cool Call from Thermostat | View Details |
| – |
Thermostat has power but will not turn on heating when room is below setpoint
|
No Heat Call from Thermostat | View Details |
| – |
Thermostat language or units (°C/°F) cannot be changed or revert after reboot
|
Configuration Storage / UI Setting Fault | View Details |
| – |
Thermostat plastic housing is discolored, warped, or has a burnt smell
|
Overheating / Component Burnout | View Details |
| – |
Thermostat randomly reboots or restarts several times a day
|
Unstable Power or Firmware Crash | View Details |
| – |
Thermostat screen is completely blank and HVAC system does not respond
|
No Power to Thermostat | View Details |
| – |
Thermostat shows correct mode but HVAC equipment runs continuously and does not shut off at setpoint
|
Stuck Relay or Incorrect Differential | View Details |
| – |
Thermostat shows humidity but does not control dehumidification or humidification as configured
|
Humidity Control Logic / Accessory Misconfiguration | View Details |
| – |
Thermostat shows strong Wi‑Fi signal but app commands (change setpoint, mode) are delayed or not applied
|
Cloud Command Latency / Sync Issue | View Details |
| – |
Thermostat temperature reading is consistently higher or lower than actual room temperature
|
Temperature Calibration / Sensor Drift | View Details |
No matching codes found
Advertisements