What to do if the AC is leaking refrigerant?

If you suspect your AC is leaking refrigerant, the most important thing to do is to call a certified HVAC professional immediately. They have the specialized tools and training required to safely detect the leak, repair it, and recharge the system with the correct amount of refrigerant.

Is an AC refrigerant leak harmful?

Yes, refrigerant can be harmful. In a low-level residential leak, the primary risk is to your AC system and energy bill, but in high concentrations, refrigerant gas can displace oxygen, posing a risk of suffocation, especially in a small, enclosed space.

Can I stay in my house with a refrigerant leak?

For a typical small leak in a residential system, staying in your house is generally considered safe as the refrigerant dissipates quickly. However, if you notice a strong chemical smell or feel unwell, you should ventilate the area and leave the house until an HVAC professional has addressed the issue.

Are AC refrigerant leaks common?

Yes, refrigerant leaks are a common issue for air conditioning systems, especially as they age. They can be caused by various factors, including corrosion on the coils, damage to the line set, or wear and tear over time.

Should I be worried if my AC is leaking?

You should be concerned, as a leaking AC system will not cool effectively and will lead to higher energy bills. If left unaddressed, the leak can eventually cause the compressor to fail, which is a very expensive repair that often leads to a full system replacement.

Can I still run my AC if it's leaking?

While you can, it’s not recommended. Continuing to run an AC with a refrigerant leak can cause significant damage, particularly to the compressor, which may eventually burn out from overwork. It is best to turn the unit off and call a professional to avoid further harm to your system.

AC Refrigerant Leak? Symptoms, Fixes & Cost-Saving Tips

Imagine your air conditioner as a car with refrigerant as its lifeblood, the essential fluid that makes it all work. This crucial chemical compound circulates through your HVAC system, absorbing heat from your home’s indoor unit and releasing it through the outdoor unit, leaving you with cool, comfortable air.

Unlike gasoline in a car, refrigerant isn’t consumed or “used up.” If your air conditioner is low on refrigerant, it means there’s only one explanation: a refrigerant leak somewhere in the sealed system.

Ignoring this problem isn’t an option. A small refrigerant leak can quickly escalate into a full-blown system failure, turning a manageable repair into a costly system replacement. It can also cause your AC unit to work harder, driving up your energy bills and contributing to environmental harm.

If you suspect your air conditioner isn’t working as it should, here are five telltale signs of an AC refrigerant leak that every homeowner should know.

Fieldpiece digital manifold gauge displaying refrigerant pressure readings — Monitoring refrigerant flow and temperature differences is essential to evaluate cooling performance and detect issues such as pressure drop, poor heat transfer, or compressor inefficiency.

1. Your AC is Running, But Not Blowing Cool Air

This is the most common and noticeable symptom of a refrigerant leak. The very purpose of your AC unit is to remove heat, but without the proper amount of refrigerant, the system can’t absorb heat effectively, according to the U.S. Department of Energy. You might feel a bit of cool air, but it will be lukewarm or just plain warm.

This isn’t a problem that will fix itself. As the refrigerant level drops, your air conditioner will continue to run for longer periods, struggling to reach the thermostat’s set temperature. This is a clear sign that the cooling process has been compromised.

2. Ice or Frost on the Evaporator Coil or Refrigerant Lines

While you might think ice equals cold air, it’s actually the opposite. When there’s a refrigerant leak, the pressure in the system drops. This causes the remaining refrigerant to get too cold as it absorbs heat, which can lead to the evaporator coil freezing over.

You might see a visible layer of frost or ice on the indoor unit’s refrigerant coil or on the copper line set that connects the indoor and outdoor units. This ice blockage prevents the system from properly circulating air and can lead to a complete shutdown of your air conditioner.

3. A Hissing or Bubbling Sound

A refrigerant leak can create distinct noises as the pressurized refrigerant gas escapes from a crack or pinhole.

A hissing sound often indicates a small, continuous leak, like the sound of air escaping from a tire.
A bubbling or gurgling noise might point to a larger leak where refrigerant is escaping from a part of the system that contains oil or moisture.

These sounds are usually noticeable near the indoor unit or the outdoor unit and are a strong indicator that you need a professional leak detection service.

4. Higher Than Usual Electricity Bills

When a refrigerant leak occurs, your AC unit has to work harder and run longer to try to reach your desired temperature. This increased workload directly translates to a spike in your energy consumption and, consequently, your electricity bill.

If your bills seem unusually high but you haven’t changed your thermostat settings, it could be a sign that your AC unit is struggling due to low refrigerant. Addressing this issue promptly can save money in the long run by preventing further system damage.

5. Longer Cooling Cycles

If your air conditioner seems to be running constantly and never cycles off, it could be struggling to do its job. A healthy AC unit will run in cycles: on until the set temperature is reached, and then off for a period.

With a refrigerant leak, the system struggles to release heat and reach the set temperature. As a result, the AC unit never gets to a point where it can shut off, leading to continuous and inefficient operation.

What to Do If You Suspect a Refrigerant Leak

Bob's Repair technician standing next to an outdoor AC unit, showcasing professional HVAC coil cleaning services for optimal air conditioning efficiency

If you’re a homeowner in the greater Las Vegas Valley, including North Las Vegas, Spring Valley, or Paradise, and are experiencing any of these signs, don’t wait. AC refrigerant leaks are a serious issue that should never be attempted as a DIY project. The refrigerant gas is a harmful chemical that requires an EPA-certified technician to handle (EPA).

A professional HVAC tech in Las Vegas from Bob’s Repair will use specialized tools, such as an electronic leak test or UV dye, to pinpoint the source of the leak. Once the leak is found, the HVAC company will perform a professional repair, such as sealing the line set or replacing a new coil, and then add the manufacturer’s specific amount of new refrigerant.

By hiring a trained technician, you ensure that the repair is done safely and correctly, protecting your air conditioner and your wallet from a more expensive repair in the future.

Don’t let a small leak turn into a complete system failure. If you suspect a problem, contact the certified experts at Bob’s Repair today for professional leak detection and repair.

5 Telltale Signs of an AC Refrigerant Leak