Smart Thermostat - heating does not start

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Hi. I have installed the Smart Thermostat as per instructions. I have an oil fired Worcester boiler.

Boiler is on constant. Thermostat clicks for demand, but pump does not start.


Any idea's please?

Thanks very much.

Answers

  • Montage
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    Impossible to say with the lack of detail. Suggests it’s not wired correctly.