Hive with Worcester 28CDi

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I am trying to fit a heating only hive to a Worcester 28CDI combi.
The light on the hive comes on but the boiler doesn't fire up.
I have removed the stat but do I need to take anything out of the boiler.

Stat and Control wiring attached

Hoping for some inspiration.

Thanks
 

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  • CONTROL.jpg
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You need to complete the old stat circuit or remove it altogether. Refit the old thermostat set to maximum and see if the boiler fires up.
 
Thanks Chris....will give it a try later this week.
If it does work I assume that I can connect red to yellow on the stat and cap off blue and earth to override it. Am I correct?
If not by leaving the existing stat of full will the hive run as it should?
Cheers
 
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Update
Eventually got round to trying with the existing Stat set to maximum....works perfectly.
Thanks for your help Chris.
 
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