Manifold noise

[scottdav]

Hi,

We currently have a problem with our downstairs underfloor heating. The boiler appears to be working, and the radiators upstairs are emitting heat, but the downstairs underfloor heating is cold. The manifold under the stairs is producing a strange whirring noise from the grey metal Honeywell unit (see photo). Any ideas what the problem may be?

Many thanks,

Scott

 

[ShaunCorbs]

synchron motors probably gone

 

[townfanjon]

Yep , needs a new one .

 

[scottdav]

Cheers guys, that turned out to be the problem. Thanks for the swift diagnosis!