Hi All, Have a loud clicking coming from a seimens 2 port zone valve, I took the cover off and a small plastic leg fell out, with the cover off and heating on the gear wheel turns constantly to operate the lever, should the gear wheel keep on turning or should it stop once it has opened the port. And finally, stupid question I know, but what does a 2 port valve do? Cheers
CENTRAL HEATING
- Thread starter ANDERSONBIKER
- Start date
ya 2port valve opens the water way and switch's the power to ya boiler and pump (dependin how its wired up). and its sounds knackerd 
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