(702) 333-8057 
Refrigerant, which many people still call Freon, is the fluid your air conditioner uses to carry heat out of your home. When it leaks, the system slowly loses its ability to cool: it runs longer and longer, your energy bills climb, and the house never quite gets comfortable. In Las Vegas heat, a small leak you shrug off in May turns into a no-cooling emergency in July. The most important thing to understand is that refrigerant is not used up like fuel. If your system is low, it is leaking somewhere, so the fix is to find and repair the leak, not just refill it. Our AC repair technicians locate the leak, repair it, and recharge to the manufacturer's spec.
How to Tell Your AC Is Leaking Refrigerant
A refrigerant leak rarely announces itself with a puddle. It shows up as a cluster of smaller symptoms that get worse over a few weeks. Here are the six signs we look for on a leak call in the valley.
Warm Air From the Vents
The most common first sign. With less refrigerant to carry heat away, the air at your registers is cooler than the room but not truly cold. You find yourself dropping the thermostat lower and lower with little effect. This is the symptom most homeowners notice before anything else.
Hissing or Bubbling Sound
Refrigerant escaping a small crack can make a faint hissing sound, and a larger leak in the lines can bubble or gurgle. If you hear either from the indoor air handler or the refrigerant lines, shut the system off and call a technician rather than running it low on charge.
Ice on the Coil or Lines
A low charge makes the evaporator coil run colder than designed, so humidity freezes onto it. Ice on the copper lines or the indoor unit is a classic leak symptom. Counterintuitive in 110-degree weather, but it points straight at low refrigerant.
Rising Energy Bills
A leaking system works harder and runs longer to do less cooling, and that shows up on your power bill. If your usage jumps without a change in habits or weather, an undercharged system is a leading suspect, especially paired with weaker cooling.
Long Run Times, Never Satisfying
An AC that runs almost constantly and still cannot hit the setpoint on a hot afternoon is struggling to move enough heat. Low refrigerant is one of the main reasons a correctly sized system suddenly cannot keep up the way it used to.
Oily Residue Near the Lines
Refrigerant travels with a small amount of oil, so a slow leak often leaves a greasy, dust-collecting film at the leak point on the lines, fittings, or coil. A technician uses this, along with electronic detectors and dye, to pinpoint exactly where the system is losing charge.
What Refrigerant Leak Repair Costs in Las Vegas
Cost depends on where the leak is, how easy it is to reach, and which refrigerant your system uses. The ranges below include labor for typical Las Vegas repairs; the diagnostic and leak-search fee is disclosed upfront before any work begins.
| Service | Typical Cost | Notes |
|---|---|---|
| Leak detection / diagnosis | $100–$300 | Electronic detector and dye test to pinpoint the leak |
| Leak repair (accessible) | $150–$600 | Fittings, valve cores, or a line repair |
| Evaporator coil replacement | $600–$1,800 | When the leak is in the coil itself |
| Refrigerant recharge (R-410A) | $150–$400 | Billed after the leak is repaired; varies by system size |
| Refrigerant recharge (R-22, older units) | $300–$800+ | R-22 is phased out and costly; often a reason to consider replacement |
If you have an older R-22 system with a coil leak, the repair can approach the cost of a new unit. In that case we will lay out the numbers honestly so you can decide between repair and a new high-efficiency installation, which ACE offers with 36-month 0% financing and 90 days of zero payments to start.
When a Refrigerant Leak Needs Same-Day Service
A small leak can often wait a day or two, but call right away if you notice any of these:
- No real cooling with the indoor temperature climbing past 85°F
- A strong hissing sound, which can mean a fast leak
- Ice forming on the lines or indoor unit that keeps coming back
- A chemical or sweet odor near the air handler
- Elderly adults, young children, or pets in the home without a cool space
ACE runs 24/7 emergency service across Las Vegas, Henderson, North Las Vegas, and communities across the valley from June through September. Call (702) 333-8057 and we will prioritize by heat-safety risk.
Preventing Refrigerant Leaks
Most leaks start at vibration-worn fittings and aging coils, and they are easiest to catch early. A pre-season tune-up checks the refrigerant charge and inspects the coil and connections, so a slow leak is caught in spring instead of failing you in July. Our technicians verify the charge, inspect the lines and fittings, clean the coils, and test the electrical components on every maintenance visit.
ACE offers a $49 new-customer tune-up special and a $69 standard tune-up for existing customers. Military members and veterans, along with senior residents, receive a 10% discount on all ACE services. Not sure what your system needs? Contact our team and we will help.
Think Your AC Is Low on Refrigerant? Let Us Find the Leak
Same-day service for most calls. 24/7 emergency response June through September. Free estimates on replacements. Financing at 0% interest for 36 months with 90 days of zero payments.
(702) 333-8057 — Call NowSchedule OnlineFrequently Asked Questions
Can I just add refrigerant to my AC myself?
No, and it is not legal to buy most refrigerants without EPA certification. More importantly, adding refrigerant without repairing the leak only masks the problem for a few weeks and can damage the compressor if the system is run badly undercharged. A technician finds the leak, repairs it, then recharges to the exact factory specification.
How much does it cost to fix a refrigerant leak in Las Vegas?
An accessible leak repair plus recharge typically runs a few hundred dollars. If the leak is in the evaporator coil or the system uses phased-out R-22, the cost is higher and replacement may be the smarter long-term choice. We always pinpoint the leak and quote the repair before any work begins, so there are no surprises.
Is a Freon leak dangerous to my family?
Modern refrigerants are generally low-risk in the small amounts a home system holds, but a leak should still be handled promptly. In an enclosed space a significant leak can displace air, and the bigger practical danger in Las Vegas is simply losing your cooling during extreme heat. If you suspect a leak, ventilate the area and call a licensed technician.