Goodman Smart Thermostats Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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E0
The thermostat display shows E0 and will not communicate with the Goodman furnace or air handler.
Communication Bus Failure
E1
The thermostat displays E1 and will not detect the indoor temperature correctly.
Internal Room Temperature Sensor Failure
E10
Thermostat displays E10, indicating high internal temperature, and may shut down temporarily.
Thermostat Overheat Protection
E11
Thermostat displays E11 and indicates a fan control error; the indoor blower may run continuously or not at all.
G (Fan) Output Circuit Fault
E12
Thermostat displays E12 and indicates a Y1/Y2 cooling output fault; the outdoor unit may not start.
Compressor Stage Output Fault
E13
Thermostat displays E13 and indicates a W1/W2 heating output fault; the furnace may not fire or may lock out.
Heating Stage Output Fault
E14
Thermostat displays E14 and indicates a humidity sensor or dehumidification control error.
Integrated Humidity Sensor or Dehumidify Output Fault
E15
Thermostat displays E15 and indicates a C-wire or power stealing error; it may run on batteries only if equipped.
Common Wire Detection Fault
E16
Thermostat shows E16 and indicates an internal clock or schedule error; schedules may not run.
Real-Time Clock (RTC) or Time Sync Failure
E17
Thermostat displays E17 and indicates a firmware update failure.
Firmware Update Corruption
E18
Thermostat shows E18 and indicates an internal battery or backup power fault (on models with a backup battery).
Backup Power Failure
E19
Thermostat displays E19 and indicates an internal sensor calibration error; temperature and humidity readings may be locked.
Sensor Calibration Data Corruption
E2
The thermostat shows E2 and will not control heating or cooling properly.
External Remote Sensor Fault
E3
The thermostat displays E3, and the system shuts down heating or cooling.
Outdoor Temperature Sensor Failure
E4
The thermostat shows E4, and the backlight may flicker or the unit may reboot intermittently.
Low Voltage Power Supply Fault
E5
The thermostat displays E5, and Wi‑Fi or smart features are disabled.
Wi‑Fi Module Failure
E6
Thermostat displays E6 and cannot connect to Goodman cloud/app services.
Cloud Connectivity or Account Authentication Error
E7
Thermostat displays E7 and fails to control heat pump defrost or auxiliary heat correctly.
Heat Pump Configuration or Reversing Valve Control Error
E8
Thermostat displays E8 and ignores user temperature changes or schedules.
Internal Memory or Configuration Corruption
E9
Thermostat displays E9, and the backlight may be dim or unresponsive to touch.
Display or Touchscreen Hardware Failure
Symptom
The thermostat app cannot control the system remotely even though the thermostat appears online.
Cloud or App Control Failure
Symptom
The thermostat cycles heating or cooling on and off too frequently (short cycling).
Improper Cycle Rate or Differential Setting
Symptom
The thermostat display is very dim or hard to read.
Backlight or Display Brightness Issue
Symptom
The thermostat fan setting is on AUTO, but the indoor blower runs continuously.
Continuous Fan Operation
Symptom
The thermostat loses all settings and the schedule after a power outage.
Non-Volatile Memory or Backup Power Loss
Symptom
The thermostat randomly changes the setpoint or mode without user input.
Unintended Control Changes
Symptom
The thermostat shows a heat or cool call active, but the Goodman equipment does not start.
Control Signal Not Reaching Equipment
Symptom
Thermostat Wi-Fi will not connect to the home network.
Local Network Connection Failure
Symptom
Thermostat backplate or wall area shows signs of condensation or water damage
Moisture Intrusion Affecting Thermostat Operation
Symptom
Thermostat buttons or the touchscreen are unresponsive or respond erratically.
User Interface Input Failure
Symptom
Thermostat display completely blank; system not responding.
No Power to Thermostat
Symptom
Thermostat does not follow the programmed schedule; stays at one temperature.
Scheduling or Program Execution Failure
Symptom
Thermostat emits a burning smell or feels unusually hot to the touch
Overheating or Electrical Failure in Thermostat
Symptom
Thermostat frequently reboots or restarts on its own.
Intermittent Power or Internal Fault
Symptom
Thermostat has power but will not turn on cooling when the temperature is set lower than room temperature.
No Cool Call from Thermostat
Symptom
Thermostat has power but will not turn on heating when the temperature is set higher than room temperature.
No Heat Call from Thermostat
Symptom
Thermostat humidity reading is inaccurate or stuck.
Relative Humidity Sensing Error
Symptom
Thermostat temperature reading is inaccurate compared to the actual room temperature.
Room Temperature Sensing Error
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E0 |
The thermostat display shows E0 and will not communicate with the Goodman furnace or air handler.
|
Communication Bus Failure | View Details |
| E1 |
The thermostat displays E1 and will not detect the indoor temperature correctly.
|
Internal Room Temperature Sensor Failure | View Details |
| E10 |
Thermostat displays E10, indicating high internal temperature, and may shut down temporarily.
|
Thermostat Overheat Protection | View Details |
| E11 |
Thermostat displays E11 and indicates a fan control error; the indoor blower may run continuously or not at all.
|
G (Fan) Output Circuit Fault | View Details |
| E12 |
Thermostat displays E12 and indicates a Y1/Y2 cooling output fault; the outdoor unit may not start.
|
Compressor Stage Output Fault | View Details |
| E13 |
Thermostat displays E13 and indicates a W1/W2 heating output fault; the furnace may not fire or may lock out.
|
Heating Stage Output Fault | View Details |
| E14 |
Thermostat displays E14 and indicates a humidity sensor or dehumidification control error.
|
Integrated Humidity Sensor or Dehumidify Output Fault | View Details |
| E15 |
Thermostat displays E15 and indicates a C-wire or power stealing error; it may run on batteries only if equipped.
|
Common Wire Detection Fault | View Details |
| E16 |
Thermostat shows E16 and indicates an internal clock or schedule error; schedules may not run.
|
Real-Time Clock (RTC) or Time Sync Failure | View Details |
| E17 |
Thermostat displays E17 and indicates a firmware update failure.
|
Firmware Update Corruption | View Details |
| E18 |
Thermostat shows E18 and indicates an internal battery or backup power fault (on models with a backup battery).
|
Backup Power Failure | View Details |
| E19 |
Thermostat displays E19 and indicates an internal sensor calibration error; temperature and humidity readings may be locked.
|
Sensor Calibration Data Corruption | View Details |
| E2 |
The thermostat shows E2 and will not control heating or cooling properly.
|
External Remote Sensor Fault | View Details |
| E3 |
The thermostat displays E3, and the system shuts down heating or cooling.
|
Outdoor Temperature Sensor Failure | View Details |
| E4 |
The thermostat shows E4, and the backlight may flicker or the unit may reboot intermittently.
|
Low Voltage Power Supply Fault | View Details |
| E5 |
The thermostat displays E5, and Wi‑Fi or smart features are disabled.
|
Wi‑Fi Module Failure | View Details |
| E6 |
Thermostat displays E6 and cannot connect to Goodman cloud/app services.
|
Cloud Connectivity or Account Authentication Error | View Details |
| E7 |
Thermostat displays E7 and fails to control heat pump defrost or auxiliary heat correctly.
|
Heat Pump Configuration or Reversing Valve Control Error | View Details |
| E8 |
Thermostat displays E8 and ignores user temperature changes or schedules.
|
Internal Memory or Configuration Corruption | View Details |
| E9 |
Thermostat displays E9, and the backlight may be dim or unresponsive to touch.
|
Display or Touchscreen Hardware Failure | View Details |
| – |
The thermostat app cannot control the system remotely even though the thermostat appears online.
|
Cloud or App Control Failure | View Details |
| – |
The thermostat cycles heating or cooling on and off too frequently (short cycling).
|
Improper Cycle Rate or Differential Setting | View Details |
| – |
The thermostat display is very dim or hard to read.
|
Backlight or Display Brightness Issue | View Details |
| – |
The thermostat fan setting is on AUTO, but the indoor blower runs continuously.
|
Continuous Fan Operation | View Details |
| – |
The thermostat loses all settings and the schedule after a power outage.
|
Non-Volatile Memory or Backup Power Loss | View Details |
| – |
The thermostat randomly changes the setpoint or mode without user input.
|
Unintended Control Changes | View Details |
| – |
The thermostat shows a heat or cool call active, but the Goodman equipment does not start.
|
Control Signal Not Reaching Equipment | View Details |
| – |
Thermostat Wi-Fi will not connect to the home network.
|
Local Network Connection Failure | View Details |
| – |
Thermostat backplate or wall area shows signs of condensation or water damage
|
Moisture Intrusion Affecting Thermostat Operation | View Details |
| – |
Thermostat buttons or the touchscreen are unresponsive or respond erratically.
|
User Interface Input Failure | View Details |
| – |
Thermostat display completely blank; system not responding.
|
No Power to Thermostat | View Details |
| – |
Thermostat does not follow the programmed schedule; stays at one temperature.
|
Scheduling or Program Execution Failure | View Details |
| – |
Thermostat emits a burning smell or feels unusually hot to the touch
|
Overheating or Electrical Failure in Thermostat | View Details |
| – |
Thermostat frequently reboots or restarts on its own.
|
Intermittent Power or Internal Fault | View Details |
| – |
Thermostat has power but will not turn on cooling when the temperature is set lower than room temperature.
|
No Cool Call from Thermostat | View Details |
| – |
Thermostat has power but will not turn on heating when the temperature is set higher than room temperature.
|
No Heat Call from Thermostat | View Details |
| – |
Thermostat humidity reading is inaccurate or stuck.
|
Relative Humidity Sensing Error | View Details |
| – |
Thermostat temperature reading is inaccurate compared to the actual room temperature.
|
Room Temperature Sensing Error | View Details |
No matching codes found
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