Problem radiators

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Hi, both the hot water and heating knobs are both set at number 5, which is where they have always been.
You could try turning the heating knob to a higher number to see if it makes any difference.

If you feel the two pipes connected to a radiator, one should be hot (flow) and the other cooler (return), but not cold. Use the two pipes connected to the boiler on the right as a guide. Any rads where the pipes feel significantly different from the boiler need further investigation.

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