Wyze
Wyze 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 reports E1 and will not control heating or cooling after installation or wiring change.
Rc/Rh Power Input Fault
E10
Thermostat shows E10 and will not connect to Wi‑Fi; remote control via Wyze app fails.
Wi‑Fi Module or Network Connection Fault
E11
Thermostat displays E11 and cannot complete initial setup or connect to Wyze cloud services.
Cloud Service / Account Linking Fault
E12
Thermostat shows E12 and reports an internal hardware fault; device may reboot repeatedly.
Internal Logic Board / Power Regulation Fault
E2
Thermostat shows E2 and cannot detect a valid C-wire or power adapter; screen may dim or reboot.
C-Wire / Common Power Fault
E20
Thermostat displays E20 and reports a heat pump O/B reversing valve wiring issue; system may heat when cooling is requested or vice versa.
O/B Reversing Valve Circuit Fault
E21
Thermostat shows E21 and emergency heat (Aux/E) does not engage on a heat pump system.
Emergency Heat / Aux Relay Circuit Fault
E3
Thermostat displays E3 and will not start cooling; AC condenser does not turn on.
Y1 Cooling Call Circuit Fault
E30
Thermostat displays E30 and reports a low-voltage short or blown fuse; HVAC system may be completely unresponsive.
24VAC Control Circuit Short / Blown Fuse
E31
Thermostat shows E31 and intermittently loses power or reboots when calling for heat or cool.
24VAC Power Drop / Brownout Under Load
E4
Thermostat shows E4 and heating will not start; furnace or heat source does not respond.
W1 Heating Call Circuit Fault
E40
Thermostat displays E40 and reports a configuration mismatch; system does not heat or cool correctly after setup.
System Type / Wiring Configuration Error
E41
Thermostat shows E41 and cannot complete calibration; screen may show calibration progress stuck.
Calibration / Sensor Alignment Fault
E5
Thermostat displays E5 and the fan will not respond to manual or automatic commands.
G Fan Relay Control Fault
E50
Thermostat displays E50 and reports an over-temperature condition; HVAC may shut down as a safety precaution.
Over-Temperature Protection / Sensor Overrange
E6
Thermostat shows E6 and cannot control second-stage heat or auxiliary heat on multi-stage systems.
W2/Aux Heat Circuit Fault
E60
Thermostat shows E60 and cannot detect the furnace or air handler; no response to heat or cool commands.
Equipment Detection / Communication Fault
E7
Thermostat displays E7 and cannot control second-stage cooling on multi-stage systems.
Y2 Second-Stage Cooling Circuit Fault
E8
Thermostat shows E8 and reports an internal temperature sensor error; room temperature reading is blank or frozen.
Internal Ambient Temperature Sensor Failure
E9
Thermostat displays E9 and shows incorrect or missing humidity readings.
Internal Humidity Sensor Failure
Symptom
Thermostat backlight flickers or brightness changes unexpectedly.
Display Power Regulation or Firmware Issue
Symptom
Thermostat buttons or touchscreen are unresponsive or laggy.
User Interface Input Fault
Symptom
Thermostat calls for cooling but outdoor AC unit does not turn on; indoor blower may run.
Open Cooling Call Circuit
Symptom
Thermostat calls for heat but furnace does not start; no error code on thermostat or furnace.
Open Heating Control Circuit
Symptom
Thermostat cannot be discovered or added in the Wyze app during setup.
Pairing / Provisioning Failure
Symptom
Thermostat does not follow schedule or setpoints; temperature drifts higher or lower than expected.
Scheduling / Adaptive Control Misconfiguration
Symptom
Thermostat emits a buzzing or humming noise, especially when calling for heat or cool.
Internal Coil or Power Component Vibration
Symptom
Thermostat fails to turn on humidifier or dehumidifier connected to accessory terminals.
Accessory Control Circuit Fault
Symptom
Thermostat fan runs continuously even when not calling for heating or cooling.
Fan Control Misconfiguration or Stuck Relay
Symptom
Thermostat frequently overshoots the set temperature, causing the room to become too hot or too cold before shutting off.
Cycle Rate / Anticipator Misconfiguration
Symptom
Thermostat humidity reading is inaccurate or stuck at a fixed value.
Humidity Sensor Drift or Contamination
Symptom
Thermostat loses time or schedule after power interruptions.
Non-Volatile Memory or Backup Power Issue
Symptom
Thermostat randomly switches between heating and cooling modes without user input.
Auto-Changeover or Control Logic Misconfiguration
Symptom
Thermostat reboots or restarts frequently, especially when heating or cooling turns on.
Intermittent Power Drop to Thermostat
Symptom
Thermostat screen is completely blank and unresponsive; HVAC system does not run.
No Power to Thermostat
Symptom
Thermostat shows frequent short cycling: HVAC turns on and off rapidly in short bursts.
Short Cycling Due to Control or Equipment Issues
Symptom
Thermostat shows it is cooling, but warm air blows from vents or house does not cool.
Cooling System or Reversing Valve Misoperation
Symptom
Thermostat shows it is heating, but only cool air blows from vents.
Heat Source Not Igniting or Heat Pump Misconfiguration
Symptom
Thermostat temperature reading is significantly different from actual room temperature.
Temperature Sensor Offset or Placement Issue
Symptom
Thermostat Wi‑Fi connection drops frequently; remote control is unreliable.
Unstable Wi‑Fi Connectivity
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E1 |
Thermostat reports E1 and will not control heating or cooling after installation or wiring change.
|
Rc/Rh Power Input Fault | View Details |
| E10 |
Thermostat shows E10 and will not connect to Wi‑Fi; remote control via Wyze app fails.
|
Wi‑Fi Module or Network Connection Fault | View Details |
| E11 |
Thermostat displays E11 and cannot complete initial setup or connect to Wyze cloud services.
|
Cloud Service / Account Linking Fault | View Details |
| E12 |
Thermostat shows E12 and reports an internal hardware fault; device may reboot repeatedly.
|
Internal Logic Board / Power Regulation Fault | View Details |
| E2 |
Thermostat shows E2 and cannot detect a valid C-wire or power adapter; screen may dim or reboot.
|
C-Wire / Common Power Fault | View Details |
| E20 |
Thermostat displays E20 and reports a heat pump O/B reversing valve wiring issue; system may heat when cooling is requested or vice versa.
|
O/B Reversing Valve Circuit Fault | View Details |
| E21 |
Thermostat shows E21 and emergency heat (Aux/E) does not engage on a heat pump system.
|
Emergency Heat / Aux Relay Circuit Fault | View Details |
| E3 |
Thermostat displays E3 and will not start cooling; AC condenser does not turn on.
|
Y1 Cooling Call Circuit Fault | View Details |
| E30 |
Thermostat displays E30 and reports a low-voltage short or blown fuse; HVAC system may be completely unresponsive.
|
24VAC Control Circuit Short / Blown Fuse | View Details |
| E31 |
Thermostat shows E31 and intermittently loses power or reboots when calling for heat or cool.
|
24VAC Power Drop / Brownout Under Load | View Details |
| E4 |
Thermostat shows E4 and heating will not start; furnace or heat source does not respond.
|
W1 Heating Call Circuit Fault | View Details |
| E40 |
Thermostat displays E40 and reports a configuration mismatch; system does not heat or cool correctly after setup.
|
System Type / Wiring Configuration Error | View Details |
| E41 |
Thermostat shows E41 and cannot complete calibration; screen may show calibration progress stuck.
|
Calibration / Sensor Alignment Fault | View Details |
| E5 |
Thermostat displays E5 and the fan will not respond to manual or automatic commands.
|
G Fan Relay Control Fault | View Details |
| E50 |
Thermostat displays E50 and reports an over-temperature condition; HVAC may shut down as a safety precaution.
|
Over-Temperature Protection / Sensor Overrange | View Details |
| E6 |
Thermostat shows E6 and cannot control second-stage heat or auxiliary heat on multi-stage systems.
|
W2/Aux Heat Circuit Fault | View Details |
| E60 |
Thermostat shows E60 and cannot detect the furnace or air handler; no response to heat or cool commands.
|
Equipment Detection / Communication Fault | View Details |
| E7 |
Thermostat displays E7 and cannot control second-stage cooling on multi-stage systems.
|
Y2 Second-Stage Cooling Circuit Fault | View Details |
| E8 |
Thermostat shows E8 and reports an internal temperature sensor error; room temperature reading is blank or frozen.
|
Internal Ambient Temperature Sensor Failure | View Details |
| E9 |
Thermostat displays E9 and shows incorrect or missing humidity readings.
|
Internal Humidity Sensor Failure | View Details |
| – |
Thermostat backlight flickers or brightness changes unexpectedly.
|
Display Power Regulation or Firmware Issue | View Details |
| – |
Thermostat buttons or touchscreen are unresponsive or laggy.
|
User Interface Input Fault | View Details |
| – |
Thermostat calls for cooling but outdoor AC unit does not turn on; indoor blower may run.
|
Open Cooling Call Circuit | View Details |
| – |
Thermostat calls for heat but furnace does not start; no error code on thermostat or furnace.
|
Open Heating Control Circuit | View Details |
| – |
Thermostat cannot be discovered or added in the Wyze app during setup.
|
Pairing / Provisioning Failure | View Details |
| – |
Thermostat does not follow schedule or setpoints; temperature drifts higher or lower than expected.
|
Scheduling / Adaptive Control Misconfiguration | View Details |
| – |
Thermostat emits a buzzing or humming noise, especially when calling for heat or cool.
|
Internal Coil or Power Component Vibration | View Details |
| – |
Thermostat fails to turn on humidifier or dehumidifier connected to accessory terminals.
|
Accessory Control Circuit Fault | View Details |
| – |
Thermostat fan runs continuously even when not calling for heating or cooling.
|
Fan Control Misconfiguration or Stuck Relay | View Details |
| – |
Thermostat frequently overshoots the set temperature, causing the room to become too hot or too cold before shutting off.
|
Cycle Rate / Anticipator Misconfiguration | View Details |
| – |
Thermostat humidity reading is inaccurate or stuck at a fixed value.
|
Humidity Sensor Drift or Contamination | View Details |
| – |
Thermostat loses time or schedule after power interruptions.
|
Non-Volatile Memory or Backup Power Issue | View Details |
| – |
Thermostat randomly switches between heating and cooling modes without user input.
|
Auto-Changeover or Control Logic Misconfiguration | View Details |
| – |
Thermostat reboots or restarts frequently, especially when heating or cooling turns on.
|
Intermittent Power Drop to Thermostat | View Details |
| – |
Thermostat screen is completely blank and unresponsive; HVAC system does not run.
|
No Power to Thermostat | View Details |
| – |
Thermostat shows frequent short cycling: HVAC turns on and off rapidly in short bursts.
|
Short Cycling Due to Control or Equipment Issues | View Details |
| – |
Thermostat shows it is cooling, but warm air blows from vents or house does not cool.
|
Cooling System or Reversing Valve Misoperation | View Details |
| – |
Thermostat shows it is heating, but only cool air blows from vents.
|
Heat Source Not Igniting or Heat Pump Misconfiguration | View Details |
| – |
Thermostat temperature reading is significantly different from actual room temperature.
|
Temperature Sensor Offset or Placement Issue | View Details |
| – |
Thermostat Wi‑Fi connection drops frequently; remote control is unreliable.
|
Unstable Wi‑Fi Connectivity | View Details |
No matching codes found
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