Nationally, the average cost of boiler repair and maintenance by a professional is $300, as of 2015. Most homeowners can expect to pay between $160 and $580 for professionals to work on a boiler. To find the best price, it's best to get quotes from multiple repair services.
The best way to keep the cost of repairs down is to ensure the boiler is properly cared for. Most potential problems can be avoided if the homeowner performs consistent maintenance. Boilers can last for more than 20 years with good maintenance, and even if issues occur, they are often less costly and serious than repairs on poorly maintained boilers.