The answer to 'how much to fix boiler in Chicago' is that the cost to repair a boiler can vary widely depending on several factors. Typically, boiler repair costs in the Chicago area can range from a few hundred dollars for minor issues up to several thousand dollars for more extensive repairs or a full boiler replacement.
The specific cost will depend on the type and age of the boiler, the extent of the damage or malfunction, the parts and labor required, and the reputation and rates of the HVAC contractor you hire. It's essential to get multiple local quotes to compare prices and find a reputable, licensed HVAC technician who can properly diagnose and fix the problem.