The answer to 'how much to fix heat exchanger in Illinois' is that the cost can vary significantly depending on several factors. As an HVAC expert, I can provide some general guidance on what influences the pricing for heat exchanger repairs.
The main factors that affect the cost are the type and size of the heat exchanger, the accessibility and complexity of the repair, and the labor rates in your local area. Typically, heat exchanger replacements can range anywhere from $800 to $2,500 or more, but it's essential to get quotes from local HVAC contractors to get an accurate estimate for your specific situation.