Hi
On saturday night i was woken by a loud clunking sound. I found that the 2 port valve that controls the central heating was making the noise. I removed the motor part of the valve and the clunking stopped. I thought the motor was screwed in some way so I ordered another (Siemens (Landis & Staefa) ZA-V222C Replacement Motor and Housing, however now I've fitted it the same thing happens. I've now seen (after using a torch!) that the motor is actually opening the valve but then instead of stopping when the valve is fully open, the motor continues running and trying to open it further... hense the clunking/banging sound. Has anyone got any ideas please??
Pete
On saturday night i was woken by a loud clunking sound. I found that the 2 port valve that controls the central heating was making the noise. I removed the motor part of the valve and the clunking stopped. I thought the motor was screwed in some way so I ordered another (Siemens (Landis & Staefa) ZA-V222C Replacement Motor and Housing, however now I've fitted it the same thing happens. I've now seen (after using a torch!) that the motor is actually opening the valve but then instead of stopping when the valve is fully open, the motor continues running and trying to open it further... hense the clunking/banging sound. Has anyone got any ideas please??
Pete