The noise is there all the time the power is on, whether or not the heating or hot water are on. I believe the pump is running as soon as I turn the power on - difficult to be sure as the pump is in the boiler casing out in the garage and the switch is in the airing cupboard! The levers are tight when the power is off.
The levers are in the same position whether the heating/hw is on or off. Is this right?
I've checked that and they are slack when heating/hw on and tight when off but should their position change when the heating/hw goes on or off? They are in the same position in both cases.
But their position remains the same?
So, what next?
Yes they do
Do you mean with heating/hw programmed as off and force the lever?
Sorry, you didn't clarify your previous question - Should I have the heating/hw off and open the controls by forcing the levers to see if they click?
The noise which was the reason for my original query has now stopped but as far as I'm aware I haven't done anything which would have remedied it. Any idea what the cause of it might have been?
Thanks for your help
The noise has returned. The heating & hw are now running on the programmer and the levers on the valves are tight. The pipes are cold so it seems that hot water is not circulating. Could this be because the valves are stuck? What's the solution?
The pump is still running when the valves are set to off