In Fareham, the amount you will spend on fixing a fault with your boiler will heavily depend on the nature of the fault itself. For a minor fault, such as replacing a gas valve, you can expect to pay anywhere from £100 to £150. However, for more serious work, such as replacing a heat exchanger, you are looking at spending £300 to £400.  You can find out how much you can expect to pay for your boiler repair in Fareham, Hampshire by using our instant online quote tool.