When do I need refrigerant line work as a standalone job?

HVAC retrofits where the condenser moves. Mini-split installs in older homes where routing the line set is the bulk of the work. Suspected line set leaks. Condenser replacements where the old line set is too far gone to reuse. Any commercial refrigeration line work. Most of it rides along with an install or repair; some of it stands alone.

Why does this matter so much?

The refrigerant loop is the heart of the system. Contaminated lines, undersized lines, or sloppy brazing show up as compressor failures and strange symptoms years later, long after the original installer is gone. Done right, copper line work lasts the life of the system.

Do you handle older refrigerants like R-22?

R-22 has been phased out of new equipment for years. We still service older R-22 systems where it makes sense, and we say so plainly when it does not: a system old enough to run R-22 is usually a replacement conversation, not a retrofit. EPA-certified recovery on every disconnection.

Can you do exposed line work cleanly?

Yes. Exposed runs get UV-stable line set cover (not bare insulation), proper fastening, and clean routing. Done right, the line work blends into the wall instead of hanging off it.

Refrigerant Line Work in the Bay Area

Refrigerant Line Work.

Most expensive HVAC and refrigeration failures trace back to bad line work. Wrong sizing, no nitrogen purge during brazing, undetected leaks, contamination. The repair is fine. The install five years ago was the problem.

Onzone does refrigerant line set installation, brazing, pressure testing, leak detection, and EPA-certified recovery and recharge. For HVAC retrofits, mini-split installs, commercial refrigeration, and rooftop systems across the Bay Area.

Problems we fix every day.

Kinked copper line set

A crushed or kinked line set throttles refrigerant flow, cuts cooling capacity, and stresses the compressor hardest exactly when Bay Area heat is leaning on the system.

Leaking brazed joints

Oil staining, low pressures, and a recharge call every season all point the same direction: pinhole leaks at poorly brazed fittings. We repair the joint, not the symptom.

Contaminated refrigerant circuit

Black scale inside a line set is the fingerprint of brazing done without a nitrogen purge. Left in the circuit, it chews through metering devices and compressors.

Improper refrigerant charge

Short cycling, warm supply air, and high head pressure often follow charge work done wrong. Recovery, evacuation, and recharge are EPA 608 jobs, and we do them by the book.

Brandon Wang July 2026

I had an excellent experience with ONzone Heating & Cooling. Oleg was professional, friendly, and very knowledgeable from the moment he arrived. He carefully inspected my air conditioning system, explained exactly what the problem was in a way I could understand, and completed the repair quickly and efficiently. I really appreciated that he took the time to answer all of my questions and never tried to sell me services I didn't need. After the repair, he made sure everything was working perfectly before leaving. My AC is now cooling better than it has in a long time. It's not easy to find a company that is honest, reliable, and truly cares about customer satisfaction, but ONzone Heating & Cooling exceeded my expectations. I will definitely call Oleg again for any future HVAC needs and will gladly recommend ONzone Heating & Cooling to my family, friends, and neighbors. Thank you for the outstanding service!

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Cathy Nelson June 2026

OMG they were a lifesaver! After a power outage my old A/C would not come on in the middle of this heat wave we're having. I went through thumbtack and received several notifications back of companies that wanted to help. Ozone was the first one. I was thrilled that they could fit me in at a 2 PM to 4 PM timeslot as I was having people over for dinner tonight and expected 92° weather. He got here he was very quick clean explained everything and reasonable. I was a little hesitant because I didn't see many reviews but it's because they're a newer company and they just haven't got them yet and I figured I'd take a chance. Boy am I glad I did. They're coming tomorrow to give me an estimate on two new heaters and two new air conditioners.. I was very happy with their service and you will be too if you find yourself in need you can't go wrong with these guys! 5 star for sure!!

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Oksana Sytnyk June 2026

I called ONzone Heating & Cooling because my AC was not cooling properly. They responded very quickly and scheduled a same-day service appointment. Teymur arrived on time and was very professional, friendly, and easy to talk to. He carefully inspected the system, explained what was causing the issue, and walked me through the repair process step by step. I really appreciated that he took the time to answer all my questions and made sure I understood what was being done. It's not often that you meet a technician who is both highly knowledgeable and genuinely cares about the customer. The problem was fixed quickly, and my AC has been working perfectly since. Teymur is someone you can trust, and I would definitely recommend ONzone Heating & Cooling to anyone looking for honest and reliable HVAC service.

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Refrigerant Line Work.