Frozen AC, Pinhole Leak, and a TXV Warning: Refrigerant Leak Repair & Recharge in Land O’ Lakes, FL 34639

On May 28, 2025, our technician Jandiel G. arrived at a home on Conestoga Dr in the Stagecoach Village area of Land O’ Lakes, FL 34639 to address a fully frozen air conditioning system. The system had been starved of refrigerant long enough to ice over the evaporator coil and line set completely. After confirming the freeze, Jandiel located a pinhole leak in the copper line set, soldered it with 5% silver solder, flushed the filter dryer circuit with R11 and nitrogen, replaced the filter dryer, pulled a deep vacuum, and recharged the system with R410A. The final invoice came to

,928.00. What made this call stand out was what the post-repair pressure readings revealed: high-side readings still running slightly above normal even after the recharge, pointing toward a TXV that took a hit during the freeze event and a load calculation that exposed the system is already operating at the residential maximum of 5 tons.

Frozen Solid on Conestoga Dr: What Jandiel G. Found on This Land O' Lakes, FL 34639 Refrigerant Leak Call

The setting for this project was the charming neighborhood of Stagecoach Village, located in Land O’ Lakes, FL 34639, a part of the vibrant Pasco County. Our client was faced with a common yet critical issue – their HVAC system was completely frozen. Instead of providing the cooling relief needed during the hot Florida summer, the air unit resembled a large, icy popsicle.

After our initial inspection, we identified a pinhole leak in the line set – a common culprit for a frozen system. Upon receiving our client’s approval, we set forth to patch up the leak and recharge the system – two of our specialties at Home Therapist.

How Far the Damage Went: Leak Repair, Filter Dryer Replacement, and a Full R410A Recharge

The project primarily involved us in identifying and repairing the leak, which was causing the system to freeze. These are common issues when it comes to HVAC systems, especially in warmer climates like Florida where these systems are working overtime. Following our proven protocol, we proposed fixing the leak and recharging the system at a moderate pace in order to avoid over-taxing the already strained components.

The client wanted their system up and running as quickly as possible. With that in mind, we were able to provide immediate relief and prepare for further work if required in the future.

Tools and Materials Jandiel Used: Silver Solder, R11 Flush, Vacuum Pump, and R410A

Our technicians, armed with industry-grade leak detectors and repair tools, were able to swiftly locate and patch the pinhole leak. Post repair, we used our specialized equipment to recharge the system, bringing it back to its efficient state, providing respite during the hot summer months in Land O’ Lakes, FL.

The Frozen Unit Problem: Why Rushing the Repair Would Have Made Things Worse

In any hands-on service industry, challenges are part and parcel of the job. In this case, our primary hurdle was the frozen state of the unit. Given that the system was frozen, taking it apart could potentially cause more damage. Our technicians used their extensive experience to carefully defrost the unit.

While carrying out the leak repair and system recharge, we discovered that the unit had possibly been operating low on gas for some time, a condition that can strain the compressor and other components of the unit. We notified the client about this potential future concern so they can be prepared.

Step-by-Step: From Leak Detection to Full System Recharge on This Land O' Lakes Job

The first step was a comprehensive site assessment that led to the discovery of the pinhole leak causing the freeze. Fixing the leak was the next crucial step, followed by a systematic recharge of the system to replenish its cooling ability.

Upon completion of the main work, we then did a thorough inspection to ensure the system was operational and efficient. At Home Therapist, we meticulously provide air purification services, guaranteeing the best indoor air quality after our service completion.

Job Complete, But Two Items Still Need Attention: TXV Performance and System Capacity

By the end of the project, our efforts led to a fully defrosted and functional HVAC system. The leak was sealed, and the system was carefully recharged, providing our client the cooling relief they desired in the Florida heat.

Our clients were extremely satisfied with our prompt and efficient service. They were particularly appreciative of how we took the time to explain possible future concerns with their unit, ensuring they are informed about their HVAC system’s condition. Our commitment to customer satisfaction aligns with our mission at Home Therapist – making every client’s home a more comfortable place.Contact us for superior HVAC services throughout the Tampa Bay area, including quality leak repair and system recharge in Land O’ Lakes, FL.

What the Post-Repair Pressure Readings Are Telling This Homeowner

Completing the leak repair and recharge is the obvious win on a job like this, but the pressure readings Jandiel pulled after the recharge are where the real story lives. The compressor and fan motor are both drawing current within manufacturer-specified ranges, which is good news. But the high-side pressure is sitting slightly above normal, and that does not go away on its own.

Here is why that matters. When a system freeze-up is severe enough, the TXV (thermostatic expansion valve) can be affected by the event itself. The TXV meters refrigerant flow into the evaporator coil, and if its sensing bulb or internal components were stressed during the freeze, it can restrict flow unevenly. That restriction causes high-side pressure to climb even when the refrigerant charge is correct. A clogged or sluggish TXV is easy to misread as an overcharge, which is why Jandiel documented it specifically rather than just logging the job as complete.

The second finding is the capacity gap. The installed unit is rated at 5 tons, which is the maximum allowed for residential systems. Load calculations suggest the home actually needs one more ton of cooling capacity. In Land O’ Lakes, where humidity stays high nine months out of the year and afternoon thunderstorms do nothing to reduce the heat load on a structure, an undersized system runs longer cycles, works harder, and is more likely to develop exactly the kind of refrigerant leak we fixed here.

• Immediate action: Schedule a maintenance visit to stabilize system pressures and inspect the TXV more thoroughly.
• Ongoing monitoring: Watch for rising high-side pressure readings over the next few months as a TXV failure indicator.
• Long-term planning: Explore supplemental cooling options, since adding a sixth ton to a residential system is not permitted under standard code.

If you are on the fence about scheduling that follow-up maintenance visit, consider that catching a TXV failure early is a fraction of the cost of another freeze event and a second recharge. Call us at (813) 343-2212 and we will get a FREE diagnosis scheduled.

Refrigerant Leak Detection and AC Repair Across Tampa Bay: What This Job Teaches Us

Tampa Bay’s combination of older housing stock, hard water, and shifting sandy soil creates a higher-than-average incidence of plumbing leaks. Homes built in the 1960s through 1980s throughout South Tampa, St. Petersburg, and Clearwater commonly have galvanized steel or polybutylene supply lines that deteriorate over time. Even copper lines in Tampa Bay homes develop pinhole leaks from the water’s mineral content and pH levels. The average water leak wastes 10,000 gallons per year, adding $100 to $200 to annual water bills before visible damage even appears.

Warning Signs of Hidden Plumbing Leaks

• Unexplained water bill increases of $20 or more per month
• Water meter spinning when all fixtures are turned off (check the low-flow indicator triangle)
• Warm or soft spots in flooring which is a slab leak symptom common in Tampa Bay concrete slab foundations
• Mold or mildew smell in cabinets, closets, or along baseboards
• Low water pressure that gradually worsens over weeks or months
• Foundation cracks appearing or widening from water erosion under the slab
• Sound of running water when nothing is turned on

Professional Leak Detection Methods

Our technicians use electronic leak detection equipment including acoustic listening devices and thermal imaging cameras to pinpoint leaks without unnecessary demolition. For slab leaks, we use helium tracer gas testing, which is the most accurate non-invasive method available. Once located, repair options include spot repair ($279 to $799), pipe lining ($1,500 to $4,000), or full repipe ($4,500 to $12,000 for a typical Tampa Bay home). The right option depends on the pipe material, number of leak points, and long-term plans for the home.

Questions Homeowners Ask

Why is my AC high-side pressure still high after a refrigerant recharge?

Elevated high-side pressure after a proper recharge usually points to a restricted metering device, most commonly a TXV (thermostatic expansion valve), or a dirty condenser coil reducing heat rejection. On this Land O’ Lakes job, the freeze-up event likely stressed the TXV’s internal components, causing the restriction. A maintenance visit to check TXV superheat and subcooling readings will confirm whether replacement is needed before it causes another freeze or compressor strain.

What does a filter dryer do and why did it need to be replaced?

The filter dryer sits in the liquid refrigerant line and removes moisture and debris before refrigerant enters the metering device. When a system develops a leak and runs low on refrigerant, the dryer can become saturated with moisture or partially blocked. On this job, Jandiel flushed the lines with R11 and nitrogen, then installed a new filter dryer to ensure clean, dry refrigerant flow after the recharge. Skipping this step after a leak repair often leads to a TXV or metering device failure within months.

Can I add a bigger AC unit if my current system is undersized for my home?

For residential systems, 5 tons is the maximum capacity allowed under standard installation codes, so simply swapping in a larger unit is not an option once you are already at that ceiling. If your home genuinely requires more cooling capacity than a 5-ton system can deliver, supplemental cooling strategies, such as a mini-split for the hardest-to-cool zone, are typically the most practical path forward. We carry Daikin mini-split systems that integrate well in situations like this. Call (813) 343-2212 for a FREE estimate and load calculation.