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F

FulhamSpark

I have recently added an extra floor to my 3 bed semi by converting my loft.

I ran a dedicated circuit in 22mm to a towel rad and a single radiator. It is on its own zone valve. The boiler is a Worcester Junior combi.

I have plumbed and wired this in myself. I a part P electrician. The pipes travel horizontally around 5m and then up two floors approx 5m. There are no excessive elbows etc.. 22mm plastic.

The issue is the loft rads will not heat up when the other rads are on. If I solely have the loft zone valve open then they get moderately warm but not hot.

Reading the spec Worcester state that the max head on a Junior is 2m.

Do you think the pump is the problem?
 

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