Old thermostat

Leepeters9 · 8 Jun 2025

Hi there,

I have a old Landis & Gyr RAD 5r and I'm trying to work out which terminal is what. I believe the 4 terminal is neutral but I'm trying to work out which one is Live and Switch live so I can install a new one.

Many thanks
Lee

flameport · 9 Jun 2025

4 blue neutral
2 yellow switched live
6 red permanent live

Leepeters9 · 9 Jun 2025

Amazing, thank you.

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Old thermostat

Leepeters9

flameport

Leepeters9

DIYnot Local

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