AC Low on Refrigerant? That Means You Have a Leak

One of the most common things we hear on a no-cool call around Seguin and New Braunfels is “it just needs a recharge.” Here’s the thing: an air conditioner is a sealed system. The refrigerant inside it isn’t fuel, and it doesn’t get used up. If the system is low, the refrigerant left through a leak, and it will keep leaving until the leak is fixed.

Rise technician walks through it in the video below, shot on a real call.

Signs your AC is low on refrigerant

• Warm or barely cool air from the vents while the system runs and runs.
• Ice on the copper line or the indoor coil. Low refrigerant drops the coil temperature below freezing, and moisture in the air freezes onto it.
• A hissing or bubbling sound near the indoor unit or the line set.
• Longer run times and a higher electric bill for the same comfort you used to get.
• It was “recharged” last summer and now it’s doing the same thing again.

Why a recharge alone isn’t a repair

Adding refrigerant to a leaking system is like putting air in a tire with a nail in it. It works for a while, then you’re right back where you started, minus the cost of the refrigerant. Depending on the size of the leak, that can mean weeks or a full season, but the leak doesn’t heal itself. And every time the system runs low, the compressor works harder, which is the most expensive part to replace.

How we find the leak

1. Confirm the charge. We connect gauges and measure pressures and temperatures, because low airflow and a dirty coil can mimic a refrigerant problem. We don’t add anything until we know the system is actually low.
2. Locate the leak. Electronic leak detectors, soap bubbles at the fittings and, when needed, dye or nitrogen pressure testing. Common spots are the indoor coil, the outdoor coil, Schrader valves and the brazed joints on the line set.
3. Show you what we found. You see the leak and get the price for the repair before any work starts.
4. Repair, then weigh in the charge. Once the leak is fixed, the system is evacuated and charged to the manufacturer’s specification, not “until it feels cold.”

When a leak points to replacement

Most leaks are worth fixing. The exceptions are a leaking indoor coil on an older system, or a system that runs on R-22 refrigerant, which has been phased out and is expensive to source. In those cases we price the repair and a replacement side by side so you can make the call. Our rule is simple: we fix first, and we recommend a new system only when it’s the smarter investment.

What to do right now

If you see ice on the unit, switch the thermostat to Off and leave the fan running so the coil can thaw before a technician arrives. Don’t keep running it iced up. Then give us a call and tell us what you’re seeing.

Quick questions

Can I add refrigerant myself? No. Refrigerant has to be handled by a licensed technician, and topping off a leaking system doesn’t fix it.

How often should refrigerant be added? Never, on a healthy system. If it needs refrigerant, it has a leak.

Does Rise serve my area? We’re based in Seguin and cover homes within about 50 miles, including New Braunfels, San Marcos, Schertz and Cibolo. See every town we serve.