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thank you ianmcd. So does this mean the boiler will constantly be on? Because I can still hear it whirring if the thermostat is on even if it is not the time to heat?

Hello Everyone! Just looking for some advice on the heating system in our house and how to work it! There is a Vaillant Ecomax boiler and Honeywell RF DT92E1000 Wireless Digital Room Thermostat - no programmer. The only way I have found to get the heating on is to turn the thermostat on at the...