A plunger and and bit of arm action! Although it is possible to have a broken boiler repaired, there are certain circumstances where these costs are just too high in this case, replacement is a better option. Have you used this member before? Follow the steps to see if you are eligible and find out what you need to do. If you were to finance your new gas boiler over a period of - years, it could pay for itself in energy savings including the interest! We are experts at diagnosing.