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Where possible, avoid touching the tank connections. Sometimes they undo easily, other times they don't and if too much effort is putting into turning them, they can distort the tank causing a leak around the joint. By loosening the pipe from the pump and the hot water flow (ie, the other 2...

it will more than likely be the connections at which external controls are fitted. At a guess, your boiler has a built in clock/programmer and no external temperature controls (room stat etc)

daft point to make but possibly worthwhile. Make sure the selector switch is on its winter setting (ie in the 'tap' and 'radiator' setting) and not on the summer setting ('tap' icon only). Failing that, sounds like some form of controls fault such as the clock/programmer. you can try...

You could drain it down and refill it but that would only rid the system of the loose/free debris floating through the system as apposed to any 'sludge' that may already be causing a reduced flow rate through your system. A lot of people think that taking each radiator off individually and...

Its impossible to say for certain whether its a good price or not BUT I would hazard a guess at the overall cost of the parts alone could be anything from £3000-£5000 depending on Manufacturer/size/type etc. Unvented Cylinder (£800-£1300) Boiler (£600-£1200) Rads (£70-£200+) (x11)...

Its no longer a legal requirement to disconnect the filling loop. On one end of the filling loop is obviously the valve with the black tap, on the other end it of the loop at the other valve, have a look under neath it and see whether there is a slotted screw looking adjustment as they also...

It may well be the condensate is blocked, not neccessarily frozen. Depending on how the condensate pipe from each boiler terminates (ie does one T into the other) Its not likely as the condensate would usually block up at the SUMP (provided the boiler has one) so for it to happen at the same...

You could (but its making a mountain out of a molehill and could cause more problems then its worth) but.... You could drain your CH, disconnect the flow/return pipes from the coil at the cylinder and see if there is a flow or water out of the coil. IF the coil was leaking (which is a...

It is relatively normal on modern boilers to get the odd whiff of unburnt gas outside the property by the flue terminal. That said, its difficult to say for certain without smelling it myself but it shouldnt be an over poweringly strong smell. If you do have any doubts then contact a GSR...

It shouldnt really matter to be honest.