Hive wiring - turns on no heating

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Hello I hope someone can help.

I am trying to change my system to hive, I've replaced the original programmer (coronet 425) however I am getting no heating.

I've attached a pic of the hive programmer wiring and the original programmer wiring
 

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Excisting thermostat gets removed for hive, I turn the hive all the way up and you can hear it click, but the boiler doesn't kick in for heat
 
Excisting thermostat gets removed for hive, I turn the hive all the way up and you can hear it click, but the boiler doesn't kick in for heat
So you didn’t join the wires? You now have an open circuit. Join the wires, see if it then fires up.
 
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Which wires do you mean?

So on the old programmer it was:
Blue - Neutral
Brown - Live
Grey - On
Black - C

So i wired it on hive as:
Blue -- natural
Brown- Live
Black - 1 (common)
Grey - 3 (heating on)
 
Which wires do you mean?

So on the old programmer it was:
Blue - Neutral
Brown - Live
Grey - On
Black - C

So i wired it on hive as:
Blue -- natural
Brown- Live
Black - 1 (common)
Grey - 3 (heating on)
You have rewired the coronet 425 programmer, to the Hive absolutely correctly - assuming you have a single channel Hive!

What we are asking - did you have a separate thermostat to control temperature, and if so, what have you done with it?
 
No I removed it and isolated with terminal blocks (only temp to see if it all worked before anything permanent) I was under thr assumption that the hive replaced this thermostat thus making it redundant and would would need the wires to be capped off
 
No I removed it and isolated with terminal blocks (only temp to see if it all worked before anything permanent) I was under thr assumption that the hive replaced this thermostat thus making it redundant and would would need the wires to be capped off
Which is what I said earlier about joining the wires. Although thermostat is redundant, the wiring make part of the circuit
 
The programmer and thermostat simply act as two switches, one after the other.
If both switches are on, the boiler will fire.

Your new Hive has the function of both the programmer and thermostat, but it only replaces one of the switches.

By isolating the thermostat, you have left the second switch turned off.
Without connecting the wires together, the boiler can't fire.

You could connect together the brown and black wires from terminals 1 and 3 of the old stat, or you can attempt to trace the cable back to where it joins the programmer - maybe behind the FCU?

The grey wire is a neutral and should be isolated separately.
 
Okay thank you all for the help, I will try it tomorrow. I removed the hive and replaced with old stat and programmer so I could have heating for tonight. Will feel stupid if it was something simple as connecting two wires.

Will update you tomorrow.
 

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