Why a New AC Froze Up and Kept Running on South Lynwood Avenue in Tampa

A new AC that freezes up and keeps running usually points to an airflow or refrigerant problem, and in this Tampa, FL 33611 case the cause was a condenser weld leak plus a failed float switch. AC repair restored proper operation by sealing the leak, replacing the failed safety device, and recharging the system.

On South Lynwood Avenue in Tampa, FL 33611, Jandiel responded to a newer system that the homeowner said was turning into a block of ice and would not shut off. The unit had been installed only a few months earlier, so this was not a wear-and-tear call. It was a warranty return visit tied to two specific problems: a factory weld leak at the outdoor condenser and a float switch that had failed after a previous visit. Those two findings explain why ac freezing up can be more than a thermostat complaint, especially when cooling performance drops slowly before the system finally ices over.

• Service performed: AC repair under warranty
• Neighborhood or street: South Lynwood Avenue
• Technician: Jandiel
• Symptom: New AC ran continuously and froze up
• Cause: Factory condenser weld leak and failed float switch
• What was done: Weld repair, filter drier replacement, vacuum, leak check, recharge, float switch correction

Two separate faults caused this Tampa AC repair call

This Tampa AC repair visit involved both refrigerant loss and a safety control issue, not just one simple defect. The homeowner reported that the system kept running, would not shut off, and had frozen into ice. That symptom pattern matters. When refrigerant leaks out slowly, the system can lose its ability to absorb heat correctly, which can let the coil get too cold and ice over. At the same time, a failed float switch removes an important layer of protection and control from the drain side of the system.

In this case, Jandiel found the refrigerant leak at a factory weld inside the condenser. That is a very specific failure point. It is different from a loose cap, a dirty filter, or a thermostat setting problem. He also confirmed that the float switch from the prior visit was defective and non-functional, so that component had to be corrected as part of the warranty work.

That is also why broad advice about “just add refrigerant” misses the real issue. A system with a leak will keep losing charge until the leak itself is repaired. For homeowners comparing symptoms with common ac blowing hot air complaints, this job is a good example of how a unit can still run for long stretches while cooling gets weaker and icing gets worse.

The condenser weld repair mattered more than adding refrigerant back

The condenser weld leak was the core mechanical problem on this job, because refrigerant work only holds when the sealed system is actually sealed again. Jandiel cleaned the area and repaired the leaking weld with 5 percent silver solder. That step matters because the repair has to bond cleanly at the leak point, not just cover it up. After that, the refrigerant was recovered into the outdoor unit, the lines were flushed with R11 and nitrogen, a new filter drier was installed, and the system was pulled into vacuum before every soldered joint was leak-checked again.

Those steps are not filler. The line flush helps clear contamination or restriction after a sealed-system opening. The new filter drier protects the refrigerant circuit by catching moisture and debris. Pulling a vacuum removes air and moisture that do not belong inside the system. Leak-checking the soldered joints verifies that the repair is holding before the final charge is adjusted.

This is also where the target phrase matters in plain English. A refrigerant recovery tank with float switch is part of the broader safety conversation around refrigerant handling, because float switch controls are used to prevent overfill conditions during recovery. Homeowners in Tampa usually never see that side of the work, but proper refrigerant handling is governed by EPA Section 608 rules for technicians working on sealed systems.

The failed float switch was a separate problem, and it needed its own fix

The failed float switch on this job was not the leak source, but it still needed to be corrected because it is a safety device that helps respond to drain problems. A float switch is designed to react when water rises where it should not, helping prevent overflow or alert the system to an abnormal condition. When that component is defective, the system loses one of its safeguards.

That is the contrarian lesson from this South Lynwood Avenue call. On a newer system, homeowners often assume one dramatic symptom must come from one dramatic cause. Here, the freezing and nonstop run time traced back to two separate faults, one in the refrigerant circuit and one in a control component. Replacing the float switch alone would not have solved the icing. Adding refrigerant alone would not have corrected the failed safety device.

Because both issues were processed as warranty work, the homeowner used our complimentary diagnostic visit and this return service was covered at no charge. You still approve a written quote before any repair begins on non-warranty work, but this visit itself was handled under the job’s warranty classification.

What changed after the leak repair, vacuum, and recharge

After the condenser weld was repaired and the float switch issue was corrected, the system was charged and put back into operation. The important result was not just that the equipment turned on. The goal was to restore a sealed refrigerant circuit, verify the repair after vacuum and leak check, and confirm the system was running again without the same freeze-up behavior that prompted the call.

The job context also shows why this was more than a quick top-off. The work included refrigerant recovery, line flushing, filter drier replacement, vacuum, leak checking, and recharge. That sequence tells you the repair was treated like sealed-system work, not a shortcut. For readers looking into AC repair in Tampa, this is the difference between masking a symptom and correcting the actual fault path.

Home Therapist handles this kind of air conditioning service across Tampa Bay, and this South Tampa call is a good example of why newer equipment can still need skilled diagnosis when two faults stack on top of each other.

Pro tips for Tampa homeowners dealing with AC freeze-ups and refrigerant leaks

Tampa’s long cooling season puts a lot of runtime on even newer systems, so a few habits can help you catch trouble earlier.

• If the indoor coil or lines start icing, shut the system off and let it defrost before service. Running it frozen can hide the real readings a technician needs.
• If a system keeps needing refrigerant, ask whether the leak was actually located and repaired. Recharging alone is not a long-term fix.
• Pay attention to safety devices like float switches after any recent install or repair. Small control parts can create big operating problems when they fail.
• When a newer unit acts up, do not assume the issue is user error. Factory defects and failed components can happen early, and warranty coverage may apply.

Questions homeowners ask after a freeze-up and leak repair in Tampa

Can a refrigerant leak make a new AC freeze up?

Yes, a refrigerant leak can make a new AC freeze up. On this Tampa job, the system had a factory weld leak in the condenser, which meant it could slowly lose charge and keep struggling to cool properly. That kind of imbalance can let the coil run too cold and build ice, especially when the system keeps running for long periods.

Why did the system keep running instead of shutting off normally?

A system can keep running when it is not satisfying the thermostat because its cooling capacity has dropped. Here, the homeowner reported nonstop operation along with freeze-up, and the leak explains that behavior well. When the system cannot move heat the way it should, it may continue calling for cooling without reaching the set temperature.

What does a float switch do on an AC system?

A float switch is a safety device that reacts to abnormal water buildup around the condensate drain system. On this call, the installed float switch was found to be defective and had to be corrected as warranty work. It was not the refrigerant leak itself, but it was still an important part of restoring proper system protection.

Is adding refrigerant enough when an AC is low?

No, adding refrigerant is not enough if the system has a leak. This South Tampa repair required finding the leak at the condenser weld, repairing it, flushing the lines, replacing the filter drier, pulling a vacuum, leak-checking the joints, and then adjusting the charge. Without sealing the leak first, the problem would come back.

Are leak repairs always guaranteed?

No, leak repairs are not always guaranteed. On this job, the warranty notes specifically stated that leak repairs are not guaranteed and that fixing one leak does not promise another will not show up later, even in the same area. That is an honest part of sealed-system work, especially when a coil or condenser develops multiple leak points over time.

Schedule AC repair in Tampa, FL 33611

If your system is freezing up, running nonstop, or slowly losing cooling in Tampa, FL 33611, Home Therapist can help you sort out the real cause. We are a licensed Tampa Bay HVAC and plumbing company, CAC1819196 and CFC1431159, founded in 2017 and backed by 1,300+ five-star reviews. We focus on clear diagnosis, plain-language explanations, and repairs that match what the equipment is actually doing, whether that means a control issue, a drain protection problem, or sealed-system refrigerant work. If you are dealing with a similar problem on the South Tampa side of our service area, call (813) 343-2212. We offer FREE estimates and FREE diagnosis on every service call, and we will walk you through the findings before any non-warranty repair begins.