Amana 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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E1
Thermostat display shows E1 and will not control heating or cooling
Indoor Temperature Sensor Open Circuit
E10
Thermostat displays E10 and cannot detect C-wire or loses power intermittently
C-Wire / Power Supply Fault
E11
Thermostat shows E11 and cannot detect or control the Amana furnace/air handler
Equipment Not Detected / Control Board Communication Error
E12
Thermostat displays E12 and will not complete configuration for heat pump or dual fuel system
Reversing Valve / O-B Terminal Configuration Error
E13
Thermostat shows E13 and indoor fan does not respond correctly to commands
G (Fan) Output Fault
E14
Thermostat displays E14 and cannot control first-stage cooling (Y1)
Y1 (First-Stage Cooling) Output Fault
E15
Thermostat shows E15 and cannot control first-stage heating (W1)
W1 (First-Stage Heating) Output Fault
E16
Thermostat displays E16 and backlight or screen brightness is abnormal
Display Backlight / LCD Driver Fault
E17
Thermostat shows E17 and internal humidity reading is missing or incorrect
Indoor Humidity Sensor Fault
E18
Thermostat displays E18 and cannot control whole-home humidifier connected to Amana furnace
Humidifier Accessory Output Fault
E19
Thermostat shows E19 and cannot control whole-home dehumidifier or over-cools for dehumidification
Dehumidification Control Fault
E2
Thermostat display shows E2 and temperature reading is inaccurate or system will not run
Indoor Temperature Sensor Short Circuit
E20
Thermostat displays E20 and cannot complete Wi‑Fi setup or connect to Amana cloud services
Cloud / Server Communication Error
E3
Thermostat shows E3 and will not control cooling properly, outdoor temperature not available
Outdoor Temperature Sensor Open Circuit
E4
Thermostat displays E4 and may shut down heating or cooling, outdoor temperature reading is incorrect or missing
Outdoor Temperature Sensor Short Circuit
E5
Thermostat shows E5 and will not connect to Wi‑Fi or Amana smart app
Wi‑Fi Module Communication Failure
E6
Thermostat displays E6 and does not respond to touch or app commands reliably
Internal Communication Bus Error
E7
Thermostat shows E7 and system will not energize heating or cooling stages correctly
Equipment Communication / Control Output Fault
E8
Thermostat displays E8 and may shut down compressor operation to protect equipment
Compressor Lockout / Low Voltage Protection
E9
Thermostat shows E9 and fan or compressor runs unexpectedly or not at all
Relay / Output Stuck or Open
Symptom
Thermostat and system operate, but indoor temperature overshoots setpoint significantly
Overshoot / Poor Temperature Control
Symptom
Thermostat backplate or surrounding wall feels unusually warm
Overheating Thermostat Electronics
Symptom
Thermostat calls for cooling but only the indoor fan runs; outdoor unit does not start
Cooling Call Not Reaching Outdoor Unit
Symptom
Thermostat calls for heat but only the fan runs and no warm air is produced
Heat Call Not Reaching Burner or Heat Strips
Symptom
Thermostat cannot be added to or controlled by the Amana smart app despite being on Wi‑Fi
Account Pairing / API Registration Failure
Symptom
Thermostat causes short cycling: system turns on and off frequently in short bursts
Improper Cycle Rate / Differential Settings
Symptom
Thermostat display is completely blank and system does not run
No Power to Thermostat
Symptom
Thermostat does not follow programmed schedule or changes temperature on its own
Scheduling / Adaptive Learning Behavior
Symptom
Thermostat does not respond to touch or buttons intermittently or at all
User Interface / Touchscreen Failure
Symptom
Thermostat frequently reboots or restarts on its own
Unstable Power or Internal Thermostat Fault
Symptom
Thermostat is on but does not call for cooling even when set well below room temperature
Cooling Call Not Generated or Not Recognized
Symptom
Thermostat is on but does not call for heating even when set above room temperature
Heating Call Not Generated or Not Recognized
Symptom
Thermostat loses Wi‑Fi connection frequently or cannot stay connected
Unstable Wi‑Fi Connectivity
Symptom
Thermostat shows correct temperature but house feels too humid or too dry
Humidity Control Ineffective
Symptom
Thermostat shows random characters or garbled display
Display Controller / Memory Corruption
Symptom
Thermostat shows room temperature that is clearly inaccurate (too high or too low)
Temperature Sensing / Calibration Error
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E1 |
Thermostat display shows E1 and will not control heating or cooling
|
Indoor Temperature Sensor Open Circuit | View Details |
| E10 |
Thermostat displays E10 and cannot detect C-wire or loses power intermittently
|
C-Wire / Power Supply Fault | View Details |
| E11 |
Thermostat shows E11 and cannot detect or control the Amana furnace/air handler
|
Equipment Not Detected / Control Board Communication Error | View Details |
| E12 |
Thermostat displays E12 and will not complete configuration for heat pump or dual fuel system
|
Reversing Valve / O-B Terminal Configuration Error | View Details |
| E13 |
Thermostat shows E13 and indoor fan does not respond correctly to commands
|
G (Fan) Output Fault | View Details |
| E14 |
Thermostat displays E14 and cannot control first-stage cooling (Y1)
|
Y1 (First-Stage Cooling) Output Fault | View Details |
| E15 |
Thermostat shows E15 and cannot control first-stage heating (W1)
|
W1 (First-Stage Heating) Output Fault | View Details |
| E16 |
Thermostat displays E16 and backlight or screen brightness is abnormal
|
Display Backlight / LCD Driver Fault | View Details |
| E17 |
Thermostat shows E17 and internal humidity reading is missing or incorrect
|
Indoor Humidity Sensor Fault | View Details |
| E18 |
Thermostat displays E18 and cannot control whole-home humidifier connected to Amana furnace
|
Humidifier Accessory Output Fault | View Details |
| E19 |
Thermostat shows E19 and cannot control whole-home dehumidifier or over-cools for dehumidification
|
Dehumidification Control Fault | View Details |
| E2 |
Thermostat display shows E2 and temperature reading is inaccurate or system will not run
|
Indoor Temperature Sensor Short Circuit | View Details |
| E20 |
Thermostat displays E20 and cannot complete Wi‑Fi setup or connect to Amana cloud services
|
Cloud / Server Communication Error | View Details |
| E3 |
Thermostat shows E3 and will not control cooling properly, outdoor temperature not available
|
Outdoor Temperature Sensor Open Circuit | View Details |
| E4 |
Thermostat displays E4 and may shut down heating or cooling, outdoor temperature reading is incorrect or missing
|
Outdoor Temperature Sensor Short Circuit | View Details |
| E5 |
Thermostat shows E5 and will not connect to Wi‑Fi or Amana smart app
|
Wi‑Fi Module Communication Failure | View Details |
| E6 |
Thermostat displays E6 and does not respond to touch or app commands reliably
|
Internal Communication Bus Error | View Details |
| E7 |
Thermostat shows E7 and system will not energize heating or cooling stages correctly
|
Equipment Communication / Control Output Fault | View Details |
| E8 |
Thermostat displays E8 and may shut down compressor operation to protect equipment
|
Compressor Lockout / Low Voltage Protection | View Details |
| E9 |
Thermostat shows E9 and fan or compressor runs unexpectedly or not at all
|
Relay / Output Stuck or Open | View Details |
| – |
Thermostat and system operate, but indoor temperature overshoots setpoint significantly
|
Overshoot / Poor Temperature Control | View Details |
| – |
Thermostat backplate or surrounding wall feels unusually warm
|
Overheating Thermostat Electronics | View Details |
| – |
Thermostat calls for cooling but only the indoor fan runs; outdoor unit does not start
|
Cooling Call Not Reaching Outdoor Unit | View Details |
| – |
Thermostat calls for heat but only the fan runs and no warm air is produced
|
Heat Call Not Reaching Burner or Heat Strips | View Details |
| – |
Thermostat cannot be added to or controlled by the Amana smart app despite being on Wi‑Fi
|
Account Pairing / API Registration Failure | View Details |
| – |
Thermostat causes short cycling: system turns on and off frequently in short bursts
|
Improper Cycle Rate / Differential Settings | View Details |
| – |
Thermostat display is completely blank and system does not run
|
No Power to Thermostat | View Details |
| – |
Thermostat does not follow programmed schedule or changes temperature on its own
|
Scheduling / Adaptive Learning Behavior | View Details |
| – |
Thermostat does not respond to touch or buttons intermittently or at all
|
User Interface / Touchscreen Failure | View Details |
| – |
Thermostat frequently reboots or restarts on its own
|
Unstable Power or Internal Thermostat Fault | View Details |
| – |
Thermostat is on but does not call for cooling even when set well below room temperature
|
Cooling Call Not Generated or Not Recognized | View Details |
| – |
Thermostat is on but does not call for heating even when set above room temperature
|
Heating Call Not Generated or Not Recognized | View Details |
| – |
Thermostat loses Wi‑Fi connection frequently or cannot stay connected
|
Unstable Wi‑Fi Connectivity | View Details |
| – |
Thermostat shows correct temperature but house feels too humid or too dry
|
Humidity Control Ineffective | View Details |
| – |
Thermostat shows random characters or garbled display
|
Display Controller / Memory Corruption | View Details |
| – |
Thermostat shows room temperature that is clearly inaccurate (too high or too low)
|
Temperature Sensing / Calibration Error | View Details |
No matching codes found
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