The answer to 'how much to fix mini split in Chicago' is that the cost to repair a mini split air conditioner can vary widely depending on several factors. Generally, you can expect to pay anywhere from $150 to $800 or more to fix a mini split system in the Chicago area.
Some key factors that influence the cost include the extent of the repair needed (e.g. a refrigerant leak vs. a compressor replacement), the brand and model of the mini split, the labor rates in your local area, and whether any parts need to be ordered. It's best to get quotes from 2-3 reputable HVAC companies in your area to get a better sense of the typical pricing for your specific situation.