Wiser by Drayton
Wiser by Drayton 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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E01
Wiser Room Thermostat shows E01 and cannot connect to the Heat HubR; heating schedule does not run.
Room Thermostat to Heat HubR RF Communication Failure
E02
Wiser Room Thermostat displays E02 and does not measure room temperature correctly; heating does not respond.
Internal Temperature Sensor Failure
E03
Wiser Room Thermostat shows E03 and the display is frozen or unresponsive to button presses.
Room Thermostat Firmware or MCU Lockup
E04
Wiser Room Thermostat displays E04 and cannot control the heating; app shows sensor fault.
Room Thermostat Humidity or Secondary Sensor Fault
E05
Wiser Room Thermostat shows E05 and the app reports a power or battery issue; device frequently disconnects.
Thermostat Power Supply or Battery Fault
E06
Wiser Room Thermostat shows E06 and the app indicates a configuration or pairing error.
Thermostat Configuration or Binding Error
E07
Wiser Room Thermostat shows E07 and the app reports a sensor calibration error; room temperature appears far off.
Temperature Sensor Calibration Error
E08
Wiser Room Thermostat displays E08 and cannot complete pairing; app shows unsupported device or version error.
Incompatible Firmware or Unsupported Device Revision
E09
Wiser Room Thermostat shows E09 and the app indicates an internal error; device may reboot repeatedly.
Internal Hardware Self-Test Failure
E10
Wiser Room Thermostat shows E10 and the app reports low signal quality or repeated dropouts.
Marginal RF Signal to Heat HubR
E11
Wiser Room Thermostat shows E11 and the app indicates a clock or schedule error; timed programs do not run correctly.
Real-Time Clock or Schedule Data Error
E12
Wiser Room Thermostat shows E12 and the app reports over-temperature protection; heating is disabled.
Thermostat Over-Temperature Protection Triggered
E13
Wiser Room Thermostat shows E13 and the app indicates under-temperature or frost protection error.
Thermostat Under-Temperature or Frost Sensor Error
E14
Wiser Room Thermostat shows E14 and cannot communicate with the Wiser app; app shows device offline while other devices are online.
Zigbee Network Join Failure for Thermostat
E15
Wiser Room Thermostat shows E15 and the app reports an internal battery temperature or safety error.
Battery Temperature or Safety Monitoring Fault
E16
Wiser Room Thermostat shows E16 and the app indicates a display or UI error; screen may be blank or partially lit.
LCD Display or UI Driver Fault
E17
Wiser Room Thermostat shows E17 and the app reports a sensor short or open circuit.
Internal Sensor Circuit Short/Open
E18
Wiser Room Thermostat shows E18 and the app indicates a firmware update failure; device may be stuck in update mode.
Thermostat Firmware Update Failure
E19
Wiser Room Thermostat shows E19 and the app reports an unknown internal error.
Generic Internal Error
H01
Heat HubR LED or app reports H01; heating relay does not respond to thermostat calls for heat.
Heat HubR Heating Relay Output Fault
H02
Heat HubR or app shows H02; hot water relay does not operate when scheduled.
Heat HubR Hot Water Relay Output Fault
H03
Heat HubR or app shows H03; system reports no internet connection and remote control via cloud fails.
Heat HubR Ethernet/Wi‑Fi Connectivity Failure
H04
Heat HubR or app shows H04; system cannot join or maintain Zigbee network for smart thermostats and TRVs.
Heat HubR Zigbee Coordinator Fault
H05
Heat HubR or app shows H05; internal temperature or safety sensor in Heat HubR has triggered.
Heat HubR Over-Temperature or Internal Sensor Fault
H06
Heat HubR or app shows H06; system reports configuration error and cannot control heating zones correctly.
Heat HubR Configuration or Zone Mapping Error
H07
Heat HubR or app shows H07; boiler demand is locked out despite valid heat requests.
Boiler Interlock or Safety Lockout from Heat HubR
TRV01
Wiser Radiator Thermostat (smart TRV) shows TRV01 in app; valve not responding to temperature changes.
TRV Motor or Drive Failure
TRV02
Wiser Radiator Thermostat shows TRV02; app reports valve travel or calibration error.
TRV Travel Range or Calibration Fault
TRV03
Wiser Radiator Thermostat shows TRV03; app reports low battery and intermittent operation.
TRV Low Battery or Power Fault
TRV04
Wiser Radiator Thermostat shows TRV04; app reports no communication with Heat HubR.
TRV RF Communication Failure
Symptom
Clicking or buzzing noises from the Heat HubR when heating or hot water turns on and off.
Normal Relay Operation or Relay Wear
Symptom
Condensation or visible moisture inside the Wiser Room Thermostat or TRV display window.
Moisture Ingress
Symptom
Heating does not come on at scheduled times, but manual boost from the app works.
Schedule Configuration or Time Sync Fault
Symptom
Heating remains on constantly even when all Wiser thermostats are set low or to OFF.
Stuck Heating Relay or External Wiring Fault
Symptom
Radiator with Wiser TRV is noisy (whistling or rushing water) when heating is on.
Hydraulic Imbalance or TRV Flow Noise
Symptom
Radiators controlled by Wiser Radiator Thermostats stay cold even when the room is calling for heat.
TRV Not Opening or No Boiler Demand from Room
Symptom
Room temperature on Wiser thermostat is inaccurate compared to actual room temperature; heating overshoots or undershoots setpoint.
Thermostat Location or Sensor Offset Issue
Symptom
Wiser app cannot find the Heat HubR during initial setup.
Heat HubR Discovery or Pairing Failure
Symptom
Wiser app shows rooms as 'offline' or 'no signal' intermittently; heating becomes erratic.
Intermittent RF Connectivity / Mesh Weakness
Symptom
Wiser Room Thermostat buttons do not respond or are very hard to press; app control still works.
Mechanical Button or Keypad Wear
Symptom
Wiser Room Thermostat or TRV frequently reports low battery even after recent replacement.
Excessive Power Consumption or Battery Sensing Fault
Symptom
Wiser Room Thermostat or TRV is physically loose on the wall or valve, causing poor readings or mechanical noise.
Incorrect Mounting or Mechanical Fixing Fault
Symptom
Wiser system frequently loses connection to the cloud; local control may still work.
Intermittent Internet or Cloud Connectivity
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E01 |
Wiser Room Thermostat shows E01 and cannot connect to the Heat HubR; heating schedule does not run.
|
Room Thermostat to Heat HubR RF Communication Failure | View Details |
| E02 |
Wiser Room Thermostat displays E02 and does not measure room temperature correctly; heating does not respond.
|
Internal Temperature Sensor Failure | View Details |
| E03 |
Wiser Room Thermostat shows E03 and the display is frozen or unresponsive to button presses.
|
Room Thermostat Firmware or MCU Lockup | View Details |
| E04 |
Wiser Room Thermostat displays E04 and cannot control the heating; app shows sensor fault.
|
Room Thermostat Humidity or Secondary Sensor Fault | View Details |
| E05 |
Wiser Room Thermostat shows E05 and the app reports a power or battery issue; device frequently disconnects.
|
Thermostat Power Supply or Battery Fault | View Details |
| E06 |
Wiser Room Thermostat shows E06 and the app indicates a configuration or pairing error.
|
Thermostat Configuration or Binding Error | View Details |
| E07 |
Wiser Room Thermostat shows E07 and the app reports a sensor calibration error; room temperature appears far off.
|
Temperature Sensor Calibration Error | View Details |
| E08 |
Wiser Room Thermostat displays E08 and cannot complete pairing; app shows unsupported device or version error.
|
Incompatible Firmware or Unsupported Device Revision | View Details |
| E09 |
Wiser Room Thermostat shows E09 and the app indicates an internal error; device may reboot repeatedly.
|
Internal Hardware Self-Test Failure | View Details |
| E10 |
Wiser Room Thermostat shows E10 and the app reports low signal quality or repeated dropouts.
|
Marginal RF Signal to Heat HubR | View Details |
| E11 |
Wiser Room Thermostat shows E11 and the app indicates a clock or schedule error; timed programs do not run correctly.
|
Real-Time Clock or Schedule Data Error | View Details |
| E12 |
Wiser Room Thermostat shows E12 and the app reports over-temperature protection; heating is disabled.
|
Thermostat Over-Temperature Protection Triggered | View Details |
| E13 |
Wiser Room Thermostat shows E13 and the app indicates under-temperature or frost protection error.
|
Thermostat Under-Temperature or Frost Sensor Error | View Details |
| E14 |
Wiser Room Thermostat shows E14 and cannot communicate with the Wiser app; app shows device offline while other devices are online.
|
Zigbee Network Join Failure for Thermostat | View Details |
| E15 |
Wiser Room Thermostat shows E15 and the app reports an internal battery temperature or safety error.
|
Battery Temperature or Safety Monitoring Fault | View Details |
| E16 |
Wiser Room Thermostat shows E16 and the app indicates a display or UI error; screen may be blank or partially lit.
|
LCD Display or UI Driver Fault | View Details |
| E17 |
Wiser Room Thermostat shows E17 and the app reports a sensor short or open circuit.
|
Internal Sensor Circuit Short/Open | View Details |
| E18 |
Wiser Room Thermostat shows E18 and the app indicates a firmware update failure; device may be stuck in update mode.
|
Thermostat Firmware Update Failure | View Details |
| E19 |
Wiser Room Thermostat shows E19 and the app reports an unknown internal error.
|
Generic Internal Error | View Details |
| H01 |
Heat HubR LED or app reports H01; heating relay does not respond to thermostat calls for heat.
|
Heat HubR Heating Relay Output Fault | View Details |
| H02 |
Heat HubR or app shows H02; hot water relay does not operate when scheduled.
|
Heat HubR Hot Water Relay Output Fault | View Details |
| H03 |
Heat HubR or app shows H03; system reports no internet connection and remote control via cloud fails.
|
Heat HubR Ethernet/Wi‑Fi Connectivity Failure | View Details |
| H04 |
Heat HubR or app shows H04; system cannot join or maintain Zigbee network for smart thermostats and TRVs.
|
Heat HubR Zigbee Coordinator Fault | View Details |
| H05 |
Heat HubR or app shows H05; internal temperature or safety sensor in Heat HubR has triggered.
|
Heat HubR Over-Temperature or Internal Sensor Fault | View Details |
| H06 |
Heat HubR or app shows H06; system reports configuration error and cannot control heating zones correctly.
|
Heat HubR Configuration or Zone Mapping Error | View Details |
| H07 |
Heat HubR or app shows H07; boiler demand is locked out despite valid heat requests.
|
Boiler Interlock or Safety Lockout from Heat HubR | View Details |
| TRV01 |
Wiser Radiator Thermostat (smart TRV) shows TRV01 in app; valve not responding to temperature changes.
|
TRV Motor or Drive Failure | View Details |
| TRV02 |
Wiser Radiator Thermostat shows TRV02; app reports valve travel or calibration error.
|
TRV Travel Range or Calibration Fault | View Details |
| TRV03 |
Wiser Radiator Thermostat shows TRV03; app reports low battery and intermittent operation.
|
TRV Low Battery or Power Fault | View Details |
| TRV04 |
Wiser Radiator Thermostat shows TRV04; app reports no communication with Heat HubR.
|
TRV RF Communication Failure | View Details |
| – |
Clicking or buzzing noises from the Heat HubR when heating or hot water turns on and off.
|
Normal Relay Operation or Relay Wear | View Details |
| – |
Condensation or visible moisture inside the Wiser Room Thermostat or TRV display window.
|
Moisture Ingress | View Details |
| – |
Heating does not come on at scheduled times, but manual boost from the app works.
|
Schedule Configuration or Time Sync Fault | View Details |
| – |
Heating remains on constantly even when all Wiser thermostats are set low or to OFF.
|
Stuck Heating Relay or External Wiring Fault | View Details |
| – |
Radiator with Wiser TRV is noisy (whistling or rushing water) when heating is on.
|
Hydraulic Imbalance or TRV Flow Noise | View Details |
| – |
Radiators controlled by Wiser Radiator Thermostats stay cold even when the room is calling for heat.
|
TRV Not Opening or No Boiler Demand from Room | View Details |
| – |
Room temperature on Wiser thermostat is inaccurate compared to actual room temperature; heating overshoots or undershoots setpoint.
|
Thermostat Location or Sensor Offset Issue | View Details |
| – |
Wiser app cannot find the Heat HubR during initial setup.
|
Heat HubR Discovery or Pairing Failure | View Details |
| – |
Wiser app shows rooms as 'offline' or 'no signal' intermittently; heating becomes erratic.
|
Intermittent RF Connectivity / Mesh Weakness | View Details |
| – |
Wiser Room Thermostat buttons do not respond or are very hard to press; app control still works.
|
Mechanical Button or Keypad Wear | View Details |
| – |
Wiser Room Thermostat or TRV frequently reports low battery even after recent replacement.
|
Excessive Power Consumption or Battery Sensing Fault | View Details |
| – |
Wiser Room Thermostat or TRV is physically loose on the wall or valve, causing poor readings or mechanical noise.
|
Incorrect Mounting or Mechanical Fixing Fault | View Details |
| – |
Wiser system frequently loses connection to the cloud; local control may still work.
|
Intermittent Internet or Cloud Connectivity | View Details |
No matching codes found
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