Having drained down upstairs central heating system to replace 3 way port valve, system refilled okay but power to radiators very poor, luke warm - return pipework cold. Tried draining all system this morning and refilled but again pipework from boiler nice and hot but return pipework cold and upstairs radiators luke warm, downstairs rads - nothing! Tried all the usual tricks to expell air from system but no luck. Boiler working as it should and pump working. Water seems to be flowing around small loop - can't make it expand to whole system. Help!
Airlock? Poor Heat to rads
- Thread starter surfrider
- Start date
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I have a similar problem - changed a radiator, had to drain the system and now the flow is restricted. Had the floor boards up on the landing to check for air locks but no joy.
I have come to the conclusion that draining down the system brought all the gunge down to one place. Have re-filled and added system cleaner to try to shift it, otherwise may have to take pump out to have a look. Going to limp along until the weather imroves.
Suspect you may have a similar blokage - was the system dosed up with inhibitor ?
I have come to the conclusion that draining down the system brought all the gunge down to one place. Have re-filled and added system cleaner to try to shift it, otherwise may have to take pump out to have a look. Going to limp along until the weather imroves.
Suspect you may have a similar blokage - was the system dosed up with inhibitor ?
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