Wiser thermostat: Red flashing while you hold the cap at minus
The thermostat has entered reset mode. Keep holding: after eight red flashes (about 20 seconds) the long press is complete.
Applies to: Wiser Radiator Thermostat. What you see: a light.
What Drayton Wiser says to do
- Release the cap after the eighth red flash; all three LEDs then flash once to confirm the factory reset.
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.