The cost of boiler repair New Lenox can vary from $50 to around $3000. A lot of variables have an impact on the cost of repairing a boiler, including which part or parts are broken, the spot where the boiler can be found, whether or not the boiler has to be moved for servicing, whether or not electrical work is needed, the sort of fuel your boiler makes use of plus the technician you choose to have done the repair.