Re: A whistling radiator
No problem. A couple of more tips. If you have TRV's, keep all doors closed where these are installed. This will heat the room sooner and shut the boiler down sooner - therefore saving money.
If you have a hot water cylinder, insulate all pipes in the airing cupboard. This retains the heat in the pipework and sent back to the boiler at a slightly higher temperature, shutting the boiler down sooner - therefore saving you money again.
Last - where ever you have a fossil burning fueled appliance ie. gas, wood, coal, coke, it is recommended that you have a Carbon Monoxide detector ( cod ) Let's save lives and have your appliances serviced every year!!!!