Introduction If you’re thinking of getting a gas boiler service, here are a few tips from Vaillant boiler repair London . Is the boiler clean? A gas boiler should be cleaned regularly. If there is a build-up of dirt and debris, it can cause problems with the heating system, which will affect your utility bills and ultimately increase your energy costs. If you notice signs of corrosion on your heating system, this is another indication that you need to call for professional help as soon as possible. Does the boiler light easily? The second thing to look out for is the boiler light. It should be easy to see; if it’s not, you may have a problem with your gas supply. If the pilot light lights easily but still doesn’t work, then check that there are no obstructions in the line from your gas meter to the boiler. Is the flue in good condition? A good rule of thumb is to check the flue for damage. If it’s damaged, you’ll need to replace it before the boile...