The technician found a refrigerant leak. They have told you the system is undercharged and located the leak, or they have told you they cannot find the source yet. Either way, the visit that started as something else just got more complicated.
Here is what you need to understand before you decide what to do.
What a Refrigerant Leak Actually Means for the System
Refrigerant is the working fluid that makes cooling possible. When the charge is low, the system cannot transfer heat effectively. The compressor works harder to compensate. Suction pressure drops. Evaporator coil temperature falls, sometimes to the point of icing over. In sustained low-charge operation, the compressor is being damaged even if it is not showing failure yet.
A leak is not a one-time event. If refrigerant is escaping, it continues escaping until the source is repaired. Topping off the charge without finding and fixing the leak is a short-term move that delays the problem and increases the cost of refrigerant with every visit.
The R-410A Factor Right Now
Most commercial HVAC systems installed before 2025 run R-410A. Under the EPA's AIM Act, production of virgin R-410A ended for new equipment as of January 1, 2025. Available supply is shifting to reclaimed refrigerant and the cost is rising. R-410A that ran $8 to $12 per pound two years ago is trending toward $15 to $25 per pound depending on supplier and timing.
That trajectory matters if your system has a known leak. Fixing the leak now is not optional math. It is clearly better than the alternative every year it goes unaddressed.
Finding the Leak
Not all leaks are found on the same visit. Small leaks can require UV dye injection, electronic leak detection, or nitrogen pressure testing to locate precisely. If the technician has added refrigerant but not found the source, ask specifically: what leak detection method was used, and what is the plan to locate it?
A legitimate contractor does not just charge the system and leave. If the leak cannot be found on the initial visit, there should be a follow-up plan with a specific detection method and a timeline.
Repair Versus Replace: Where the Leak Is Changes the Math
A leak at a fitting, valve, or service port is typically straightforward and inexpensive. $200 to $600 for the fix plus refrigerant recharge is a reasonable range. That repair makes sense on almost any unit with meaningful remaining life.
A leak in the evaporator coil or condenser coil is more serious. Coil repairs run $1,000 to $3,500 depending on coil and access required. Coil leaks recur. If the coil is leaking on a unit that is 12 or more years old, that repair cost belongs in the repair-versus-replace analysis.
A compressor leak or a leak in a brazed refrigerant line inside the unit is the most serious scenario. Those repairs can exceed the value of the equipment on older units.
Quick Answers
Can I keep running the system while the leak is being tracked down?
A mildly undercharged system will run but at degraded efficiency with compressor stress building. If the charge is significantly low, running the system risks compressor damage. Ask the technician specifically whether the system is safe to operate at current charge levels.
What does a refrigerant recharge cost on a commercial system?
A commercial rooftop unit typically holds 10 to 30 pounds of refrigerant depending on size. At current R-410A pricing of $15 to $25 per pound, refrigerant alone for a full recharge on a larger unit runs $300 to $750. Add leak detection labor, repair labor, and the handling fee and a leak call plus repair can clear $1,500 to $3,000 easily. Does a refrigerant leak require reporting?
EPA Section 608 regulations require repair of leaks on systems with more than 50 pounds of charge when the annual leak rate exceeds 30 percent for commercial comfort cooling. Your contractor is required to track and report refrigerant usage. If the system has a significant ongoing leak, that regulatory requirement is part of the conversation.
maintenance plans, 24/7 service, and system replacement across Southeast Michigan. Call (248) 590-0010 or reach out at sales@vitalitymechanical.com.