E08
Wiser by Drayton Incompatible Firmware or Unsupported Device Revision

Wiser Room Thermostat displays E08 and cannot complete pairing; app shows unsupported device or version error.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Thermostat running outdated firmware, Heat HubR firmware too old to support this thermostat model, Region or hardware revision mismatch, Partially failed firmware update

How to Fix / Troubleshooting

Safety: No mains work required beyond possibly power-cycling the Heat HubR.

  • Update Heat HubR firmware: Connect the Wiser system to the internet and check for updates in the Wiser app. Allow any available firmware updates to complete.
  • Power-cycle Heat HubR: Isolate power at the fused spur, wait 30 seconds, then restore power. Wait for the LEDs to stabilise.
  • Factory reset thermostat: Perform a factory reset on the thermostat and attempt pairing again via the app.
  • Check model compatibility: Confirm that the thermostat model is officially supported by your specific Wiser by Drayton Heat HubR generation.

If E08 remains after updates and resets, the thermostat or Heat HubR may have incompatible hardware or a firmware fault. Contact Drayton support or replace the incompatible component.

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Repair Difficulty

Medium 3/5

Required Part

Wiser Heat HubR main PCB
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