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