The motorised valve on my central heating keeps ticking and causing electrical interference on my TV. I have replaced the motor but this has not stopped the problem. When the valve is activated the motor keeps oscilating slightly. I can stop the ticking by manually locking the valve open.
Thanks for tips. Problem solved. The relay switch inside the three port valve was worn, thus not switching positively. Hence the oscilating (relay cuitting in and out). Had to invest in new Power Head. Hope this helps someone else.
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