The answer to 'boiler repair cost' is that the cost can vary significantly depending on several factors. Boiler repair costs are influenced by the type and age of the boiler, the extent of the repairs needed, the cost of replacement parts, and the labor rates in your local area.
In general, minor boiler repairs like fixing a leak or replacing a thermostat can range from $150 to $500. More extensive repairs, such as replacing a heat exchanger or controlling board, can cost $500 to $2,000 or more. The best way to get an accurate estimate is to have a licensed HVAC technician inspect your boiler and provide a detailed quote for the necessary repairs.