Replacing a honeywell st9400c controller with a hive setup..

Calum Coomes · 9 Oct 2017

I have them from the instructions provided. It's threw me when in the manual it's common, water off and water on. And on the old stat just C and LOAD. Learnt a lot through my error though.

Boiler buddy · 9 Oct 2017

So true, good to see it solved though. All in all they aren’t a bad appliance

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Replacing a honeywell st9400c controller with a hive setup..

Calum Coomes

Boiler buddy

DIYnot Local

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