Recent content by Hopeless diyer

So here are the readings: Red to Blue 4v Yellow to Blue 244v I get the same when testing Red to Earth wire and Yellow to Earth wire. I am now thinking Yellow is the live feed and should go to L with link to 1. The Red should go to 3. Does this seem correct?

So to confirm red is live feed should I take a reading from red to the blue that's in the terminal bloc and confirm it's reading the full 230v?

So checked with multimeter and voltage difference between the red & yellow is 204.

Okay I'll check tomorrow and update here.

No, if I get one what am I testing it for?

Yup combi, it's a vaillant ecotec pro 28.

Looking for some help / guidance to replace our existing Honeywell cm921 thermostat with a Hive. I've removed the faceplate and there is a red wire connected to A a yellow wire connected to B and a blue wire going to one end of a terminal. I can also see a green/yellow wire behind this not...