It may not be economically viable to repair, and a new boiler is by far the best option. If the ball valve shuts off and the water level continues to rise then the fault is normally a mains pressure supply somehow getting into your tank fed system.So its time to call a plumber for most people. This valve may need to be cleaned or replaced completely and is a fairly cheap repair. So, if your choice is to just replace the leaking Diverter valve, we can carry out the replacement for you. I cannot believe I need to get a new boiler installed!!
It's a white pipe so i would assume its plastic. Using a spanner, tighten the gland nut and see if the leak subsides. If this turns out to be something I could fix myself, even better. If it doesn't shut off you need to either repair or replace the ball valve. If this still doesn't stop the leak, you may have to drain down the system and replace the valve failing that, it's probably a good idea to call a plumber. Do you know anyone that needs a new boiler cost installed?
To do this you have to drain the heating system of water and then loosen the nut between the leaking pipe and the radiator. Then turn off the hot tap and wait to see if the ball valve closes once the tank is full again. I wouldn't recommend you doing this yourself , unless you feel completely comfortable, and have the tools and equipment to do it properly. Took some pictures of both the box and the boiler. We cover most areas. I recently purchased a vaillant ecotec pro from a boiler company online!
If this fails, you'll need to replace the olive inside the coupling. They know everything about one-pipe steam systems. First thing he does is fill the boiler to the top with water to see if it leaks. Is likely to be a faulty condensate pump. You can check your low water cut-off by running the boiler and starting to drain it and see if the low water cut-off shuts it down, if not its defective, Sorry. Getting a gas boiler does not have to cost a fortune!
Any help you can provide would be extremely useful. Found a lot of good info there. Often, a leak at the radiator valve coupling nut can often be fixed by simply retightening the coupling. Run a tap until the water level drops then turn the water back on again. In fact, for a little, I have one on the new boiler that has a digital readout that tells me how MUCH feed water has been through it, so I can monitor whether there seems to be a problem. Do you need a electric boiler in your house?
Finding a leak may sometimes feel like finding a needle in a haystack, but it's worth trying to find it yourself, before calling out a plumber, as most heating engineers charge an hourly rate, which can become quite expensive, and should be tasked with finding the leak on your central heating system. Maybe you should get the local rep involved if so, before you have work done on it. The other thing is a filter to prevent scale buildup in your boiler - it should be replaced frequently. Disconnect it and blow through it. Be sure that you carefully check the site of the fitting for any leaks. Your best option here, is to get yourself a new boiler. Getting a vaillant boiler fixed can go really smoothly when done correctly.
I am not sure if there is a link to when the heating is on or now. They are next to a bathroom but not a million miles from the two water tanks in the loft. Third Thing to check IS THE BOILER PRESSURE RELIEF VALVE LEAKING ? Is the pipe coming off the pressure relief valve on the boiler continually dripping water ? If so at some point the valve has probably operated and there may be some internal debris that stops it from properly shutting off again. Second thing to check IS THERE A LEAK IN YOUR CENTRAL HEATING SYSTEM? Look for signs of a water leak such as a damp floor, leaky pipes, a small hole in a radiator somewhere or a stain on your ceiling, any or all of these signs point to you having a leak on your central heating system, which is causing your boiler to lose pressure. Who would of thought you can pay for a vaillant ecotec plus monthly?