Wiser thermostat: All three lights flash once
Confirmation that the thermostat is factory resetting. It then reboots, ready to be paired again in the Wiser app.
Applies to: Wiser Radiator Thermostat. What you see: a light.
What to do
Drayton Wiser gives no step for this on the page cited; the meaning above is all it says.
Source
Drayton Wiser’s own help page, read on the date shown.
- Drayton Wiser: How to Factory Reset a Wiser Radiator Thermostat — Wiser Radiator Thermostat. wiser.draytoncontrols.co.uk Checked 2026-09-29.