air in pipe after pump Help and information on all topics relating to your central heating, air conditioning and ventilation issues.

[jim barlow]

I have cleaned and flushed system but on refilling I cannot get a flow to the radiators, the hot water system is fine, I have fitted anew pump and zone valve all points have been bled but I cannot get a flow to the radiators. Please HELP. Jim Barlow

[htg engineer]

Vented all air from pump vent ? turned pump speed to maximum ?

Are you sure the zon valve or three port valve ? fitted correctly and working ?

room stat calling for heat ?

Select hot water, remove actuator and trun the valve manually - if the radiators heat it's the actuator at fault.