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Mend Radiators System Valve

Airlock in radiators?

i have cold spots in the middle of two radiators in my heating system i have tried bleeding them by undoing the valve in the top of the radiator but cannot get any air out. what could the problem be?

Matthew Wharton
October 2008
Heating, Home Heating SystemsRadiators System Valve
Probably sludged up.They need taking off and washing out.

Tony S
October 2008

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Radiator Cold Spots - No Air Bleeding?