AC Freon Leak Repair & Recharge Cost (2026)

An air conditioner does not use up refrigerant. If it needs more, there is a leak. HomeGuide puts finding the leak, fixing it and refilling the system at $200 to $1,500, with a national average of $800. Angi lists refrigerant leak repair at $250 to $1,500 and a recharge at $100 to $500.

Recharge cost

Refrigerant	Recharge	Per pound, installed
R-410A (systems after 2009)	$100 – $320	$50 – $80
R-22 (systems before 2010)	$180 – $600	$90 – $150

Source: HomeGuide. The national average recharge is about $225.

Cost by system size

AC size	Refrigerant	Full replacement charge
2 ton	4 – 8 lbs	$200 – $800+
2.5 ton	5 – 10 lbs	$250 – $1,000+
3 ton	6 – 12 lbs	$300 – $1,200+
4 ton	8 – 16 lbs	$400 – $1,500+
5 ton	10 – 20 lbs	$500 – $2,000+

Source: HomeGuide. Most leaks need only a top-off, not a full charge.

Leak detection

Item	Cost (HomeGuide)
Leak detection test	$100 – $330
Diagnostic service call	$75 – $200
Technician labor	$75 – $150 per hour
After-hours labor	up to $250 per hour

Cost by leak location

Location	Cost (HomeGuide)
Refrigerant line set	Lowest cost; sometimes welded in place
Condenser coil replacement	$900 – $2,300
Evaporator coil, under warranty	$1,000 – $2,500
Evaporator coil, out of warranty	$2,500 – $4,500+
Compressor, out of warranty	$1,800 – $2,800

For coil prices, see AC coil replacement cost.

Leak sealant

HomeGuide lists DIY leak repair kits at $70 to $160 and sealant refills at $30 to $100. Sealants can only plug very small leaks and some systems need several applications.

Repair or replace?

HomeGuide suggests replacing the AC instead of repairing the leak when:

The AC is more than 10 years old.
It uses R-22 refrigerant.
The repair costs at least 50% of a new AC.
The repair cost times the system's age is more than $5,000.

A new AC costs $5,000 to $8,300 installed (HomeGuide). See AC replacement cost.

Signs of a refrigerant leak

Warm or barely cool air from the vents.
Ice on the indoor coil or the copper line.
A hissing or bubbling sound.
Higher electric bills and longer run times.

Refrigerant leaks are the real problem

Air conditioners do not use up refrigerant. If a system is low, it has a leak. Adding refrigerant without finding the leak only buys time, and the system will lose it again.

How technicians find leaks

Electronic leak detectors that sense refrigerant.
UV dye added to the system and traced with a light.
Bubble solution on fittings and valves.
Nitrogen pressure tests that isolate sections of the system.

Common leak locations

Evaporator coils, the condenser coil, Schrader valves at service ports, flare fittings, and refrigerant lines that rub against something are common culprits.

What affects the price

Leak location and accessibility. A leaky valve core is a quick fix; a coil leak may mean replacing the coil.
Refrigerant type. R-22, used in older systems, has been phased out and is expensive. Newer systems use R-410A or newer refrigerants.
Amount of refrigerant needed to recharge.
Diagnostic time.

More on repair or replace

If the leak is in an indoor or outdoor coil on an older R-22 system, replacing the system is often the better long-term choice. On newer systems, repairing the leak or replacing the coil under warranty usually makes sense.

Questions to ask

Where is the leak, and how was it found?
Will you repair the leak or only add refrigerant?
What type of refrigerant does my system use?

In Texas

Because Texas systems run for long seasons, a slow leak can turn into high repair costs over a summer. Signs like ice on the lines, weak cooling or a hissing sound are worth checking early.

Freon, R-22 and newer refrigerants

"Freon" is a brand name that people use for any AC refrigerant. Older systems used R-22, which is no longer produced in the US, so it is expensive and getting harder to find. Many systems built in the last couple of decades use R-410A. The newest systems use refrigerants such as R-454B and R-32, which have a lower environmental impact.

The type matters for repair costs. Refrigerants cannot be mixed, and a system must be recharged with the refrigerant it was designed for. Recharging an R-22 system is often the most expensive, and a large leak in an R-22 system often makes replacement the better choice.

Why "topping off" is not a repair

An air conditioner is a sealed system. It does not use up refrigerant the way a car uses fuel. If it is low, there is a leak. Adding refrigerant without finding and fixing the leak only restores cooling for a while, and the refrigerant escapes again. Over time, this costs more than fixing the leak, and running low on refrigerant can damage the compressor.

How a leak repair is done

Once the leak is found, the repair depends on where it is. Leaks at fittings, valves or service ports can often be tightened or replaced. Leaks in copper lines can be brazed. Leaks in the evaporator or condenser coil, especially in the thin tubing, may mean replacing the coil. After the repair, the technician pressure-tests the system with nitrogen, evacuates it and recharges it to the manufacturer's specification.

Signs of low refrigerant

The air from the vents is not as cold as usual.
The AC runs for long periods without cooling the house.
Ice forms on the indoor coil or the refrigerant line at the outdoor unit.
A hissing or bubbling noise near the unit.
Higher energy bills without a change in use.

Leak sealants

Some technicians offer sealant products that are injected into the system. Results vary, and some manufacturers and technicians do not recommend them because they can clog parts. Ask about the manufacturer's position before agreeing to a sealant, and know that it is not a fix for large leaks.

Legal handling of refrigerant

Technicians who handle refrigerant must be certified by the EPA, and venting refrigerant into the air is illegal. A legitimate company recovers the refrigerant and documents the work.

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El Paso	66	4.5	11,208

AC Freon Leak Repair & Recharge Cost