HVAC Leak Repair vs. Freon Recharge with Leak Seal: What’s the Difference?
Now let’s talk about one of the most common service calls we get in Los Angeles—a system not cooling properly due to low refrigerant levels. You may hear terms like recharge, leak seal, or leak repair. Here’s what they really mean:
Proper Leak Repair: The Professional, Long-Term Solution
When you request a leak repair, you’re opting for a full EPA-certified service that involves several technical steps:
Full Refrigerant Recovery – Using a recovery machine and recovery tank, our EPA-certified technician safely removes all existing refrigerant. This process alone can take about an hour.
Nitrogen Leak Test – We pressurize the system with nitrogen to detect the exact location of the leak. This step can take up to four hours for a thorough inspection.
Silver Brazing – Once the leak is found, we repair it using an oxygen-acetylene torch and 15%+ silver brazing rods to seal it permanently with copper and silver joints.
Second Nitrogen Test – We test again to make sure the repair is completely sealed—no shortcuts.
Triple Vacuum Procedure – We vacuum the system three times, purging with nitrogen between cycles to eliminate all moisture and non-condensable gases—critical for long-term system health.
Recharging – Once everything is verified to be airtight and clean, we recharge your system with the correct refrigerant, returning it to factory-level performance.
This process is more expensive, but it’s 100% reliable, and we stand behind it with a comprehensive warranty.
Recharge with Leak Seal: A Cheaper, Short-Term Option
Some homeowners choose the quicker and cheaper recharge with leak seal option. This involves:
Recharging the system with refrigerant (Freon or R410A)
Adding a chemical leak sealant, such as Nu-Calgon Leak Seal, designed to react with moisture (air) and seal small leaks from the inside
However, this method:
Does not identify where the leak is
Cannot be pressure tested
Offers no guarantee that the leak will stop permanently
Cannot be warrantied, because we don’t know the source or severity of the leak
While some customers choose this to “buy time” or due to budget limitations, we always advise that proper leak repair is the only reliable, long-term solution.
So, Which Option Is Right for You?
If you’re in Los Angeles and your system isn’t cooling properly, we’re happy to evaluate it and explain your options—honestly and professionally. Whether you need a quick recharge, a detailed leak repair, or you’re considering upgrading to a heat pump or mini-split, our certified technicians have the tools, training, and experience to do the job right.
Why Choose FUSE HVAC Los Angeles?
Factory-trained and authorized HVAC technicians
EPA-certified for refrigerant handling and leak detection
Fully licensed and insured
Honest recommendations based on your home and budget
Flexible scheduling and fast service across Los Angeles
3-year warranty on labor for full leak repairs
Ready to Restore Your Comfort?
Call us today at (213) 279-9223 or book online at fuselac.com for expert HVAC service in Los Angeles. Whether it’s a leak, a new install, or just a second opinion—you’re in good hands.