Hi,
My central heating system is working OK but I have an annoying proble with the above valve. Sometimes when the central heating / hot water has turned off th valve will buzz. If I switch the electrical power off then on from i for a few seconds it stops!
Is there a fault with it and if so could I just change the actuator o do I need to change the entire valve?
Thank
-- waltfen
Could be low voltage. When you switch off and on again you could produce a small surge that shocks it into position.
Some solenoid valves have a detachable coil. This so that same valve body can be used with coils for different voltages. These coils were held in place by a strong spring, but some would still buzz. I then removed the coil, applied some transistor heat sink compound or a high temperature (wheel bearing) lubricant on what that coil would slide down on, and reassembled the valve. That high temperature cream would dampen vibrations - no more noise.
The problem would be > Hi,
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