The average cost for an air conditioning refrigerant line replacement is between $525 and $556. Labor costs are estimated between $113 and $144 while parts are priced at $412. Estimate does not include taxes and fees.Click to see full answer. Beside this, how much does it cost to replace AC hose in car? Car AC Hose Repair & Replacement Cost Car AC hose repair or replacement costs between $486 and $514 with labor being between $103 and $131 as stated by Repair Pal.Also Know, what is an AC discharge hose? The High Side AC Hose carries the pressurized refrigerant from the high-side components of the AC system to the low side. The High Side AC hose carries the highly pressurized liquid refrigerant on the discharge side of the compressor to the expansion valve, which is the entry point of the low-pressure side. Thereof, how much does an AC diagnostic cost? The average cost for an AC diagnosis is between $88 and $111. Labor costs are estimated between $88 and $111. Estimate does not include taxes and fees.Why is my car air conditioner not blowing cold air?The most common causes of broken air conditioning are leaks or compressor issues. If your air is blowing cool but not cold, the problem could be a clogged filter, cooling fan problem, radiator trouble, or it could simply be that you need to recharge your AC.