Commercial Rooftop AC Refrigerant Leak Repair in Clifton, TX

June 15, 2026 — Clifton, TX

When a commercial rooftop unit stops cooling in the middle of a Central Texas June, the dining room feels it within the hour — and so do your customers. That was the situation at a Clifton restaurant last week, where the rooftop air conditioning serving the dining room had quietly given up as the lunch rush built.

The fix came down to a single, often-overlooked failure point: a refrigerant leak at the low-pressure control capillary tube. Here is how the call went, and what it tells you about your own rooftop equipment heading into the hottest stretch of the year.

The Symptom: A Rooftop Unit That Runs but Won’t Cool

The unit was powered and the compressor was cycling, but the air coming off it wasn’t cold. That combination — equipment that runs without producing cooling — almost always points to one thing on a packaged rooftop system: the refrigerant charge is low or gone.

A rooftop AC unit can’t move heat without a full charge. When refrigerant drops below the level the system needs, the compressor keeps working but the air handler blows warm. Push it long enough and you risk compressor damage on top of the original leak.

The Diagnosis: A Leak at the Low-Pressure Control Capillary Tube

Texian Cold lead technician Clay traced the lost charge to a leak at the low-pressure control capillary tube — the small line that feeds pressure to the safety control. It’s a common leak point on commercial rooftop units because:

• The thin capillary line is exposed to constant vibration from the compressor and fans.
• Rooftop placement means full exposure to sun, wind, and temperature swings.
• The fitting at the control is a high-stress connection that fatigues over years of cycling.

Because the leak was at the control line rather than deep in the coil, it was a repairable failure — not a full component replacement. That distinction is the difference between a same-day fix and an equipment-out-of-service estimate.

The Repair: Seal the Leak, Recharge, Verify

Clay repaired the leak at the capillary tube, then recharged the system with R-410A to bring it back to the manufacturer’s specified charge. With the leak sealed and the charge restored, the rooftop unit returned to proper cooling and the dining room came back down to temperature.

Recharging without finding and fixing the leak first is a short-term patch that leaves the operator paying for refrigerant twice. Sealing the leak before charging is what makes the repair hold.

Rooftop AC down and the dining room heating up? Call 254-272-2714 — Texian Cold runs commercial HVAC service across the Heart of Texas, and we’ll get a tech on your roof fast.

Why This Matters Before Peak Summer

Refrigerant leaks rarely announce themselves. A unit can lose charge gradually for weeks, running longer and longer to keep up, before it finally can’t. By the time the dining room is warm, the system has often been straining — and burning energy — for a while.

For commercial operators, a few habits catch these failures early:

• Watch for rooftop units that run noticeably longer to hit the same setpoint.
• Note any climbing energy bills that don’t track with the weather alone.
• Schedule pre-season commercial HVAC service before the first sustained heat wave.

Catching a low charge in spring is a service call. Catching it during a July lunch rush is an emergency — and sometimes a compressor replacement. When a repair no longer makes sense, our commercial HVAC installation team can size and replace aging rooftop equipment before it strands you mid-summer. Pairing repairs with ongoing energy management keeps the whole system running efficiently between visits.

Commercial Rooftop AC Repair Across Central Texas

From Clifton to Meridian and across the Heart of Texas, Texian Cold keeps restaurants, retailers, and commercial facilities cool when their rooftop equipment falters. Call 254-272-2714 for same-day commercial HVAC service.

Texian Cold proudly serves Waco, Hillsboro, Whitney, Temple, Gatesville, Mexia, Clifton, Meridian, Groesbeck — and surrounding Central Texas communities.