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Flame port Thank you for detailed reply and feedback. Much appreciated. Thermostat is definately the c27. It was used on my boiler and hot water tank system hence 2 channels and installer of combi unit retained its use. You are correct on the thermostat being the non lamped T6360B. You also...

I am hoping someone can help with my query. I am replacing my existing Centaurplus c27 controller and Honeywell thermostat with the Drayton wiser 1 channel system to control my vallient combi boiler (no separate hot water). My first query is in regards to the thermostat. I understand I should...