tado thermostat: Wireless Receiver: error triangle light on

Our drawing: colour not stated by the maker, solid (steady) or shown, on a receiver by the boiler.

You may be having connectivity issues.

Applies to: tado° Wireless Receiver (UK and EU). What you see: a light.

What to do

tado° Help Center gives no step for this on the page cited; the meaning above is all it says.

The maker puts this down to Wi-Fi or the network. If the problem is the router itself, its own lights are explained on the router and broadband hub lights page.

tado’s own help page, read on the date shown.

tado° Help Center: What do the LEDs and blinking states on the Wireless Receiver mean? — tado° Wireless Receiver: the UK Programmer with Hot Water Control and the EU version. support.tado.com Checked 2026-09-29.