Main 18 Heat ERP boiler. Wiser smart TRV controls. Drayton Auto balance thermostatic valves.
I'm having problems maintaining good flow around CH system. The out flow is 60c and return is 55c. As a result the boiler is reaching set point and switching off before rads get hot enough. I've replaced the flow thermistor and tried different pump speeds. I've been advised I probably have a blockage somewhere but don't want to involve a power flush unless I'm sure. Any help would be greatly appreciated.
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I'm having problems maintaining good flow around CH system. The out flow is 60c and return is 55c. As a result the boiler is reaching set point and switching off before rads get hot enough. I've replaced the flow thermistor and tried different pump speeds. I've been advised I probably have a blockage somewhere but don't want to involve a power flush unless I'm sure. Any help would be greatly appreciated.
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