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Thanks CBW! You gave me a bit of a brainwave - turns out two zone valves and control unit hidden beneath bath. Forced open and works perfectly

Ahh. I’ve even tried taking out the switch wire from thermo’s from behind the fused spur - but no joy here either.

I don’t think I have zone valves unless they’re hidden away? I have a 2 bed semi with a combi boiler.

Oh, this is the issue? So each thermostat upstairs works independently? I just assumed as soon as one of them hit the temp it’d turn all heating off.

This is the installation manual for the boiler. Wiring diagram on page 34. https://idealheating.com/uploads/documents/Logic-Combi-Esp1-Installation-And-Servicing-222353-1_inst.pdf

Neither. Initially removed both thermostat’s by just insulating the cables and putting a blanking plate over it. Then installing Hive as per normal. So just the single thermostat from Hive. Yeah, boiler fires up. Rad logo and flame shows on boiler LCD, I can touch pipework (CH-in beneath the...

That one is from the old thermostat. Just pushed it in for testing only. (It does get rads warm)

And whilst I’m thinking about it. Old thermo wired in using general live. I’m trying to do diagram A. Though I’ve tried doing Hive as C and still no joy.

This is what I’ve got.

Sorry, that pic is pre-me installing. I shall take more pics :)

Hi, I’ve recently bought a new build house and it has an Ideal Logic Combi ESPI 30 boiler located in the kitchen. I have two thermostats - dual zone one in hall other in Bed 1. These are both ESI ESRPT6C models. I have wired hive exactly as the internet suggests and this is consistent with how...