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Thanks for that...tried it and have upped the pressure but the radiators are still cool at the bottom and warm at the top...not even very hot... again the pump seems to come on for approx 10/15 secs then off again...about a minute later the same... Any more ideas??

I have a modena 102 combi Boiler...heating is set to be on at night but the Radiators are not heating properly. Seem to only be heating a little in the middle or at the top...bottoms are cold. Also the pressure Gauge on the boiler is below 1 and when the boiler kicks in every so often..it...