Commercial Trane Repair – Rooftop Compressor Replacement

When a commercial cooling system fails, indoor temperatures rise quickly and comfort drops fast. Recently, we were called to service a Trane rooftop heat pump that had completely stopped cooling. The building relied on this unit for daily operation, so restoring cooling was a top priority.

Our services for commercial trane repair ensure your units are functioning efficiently and effectively.

Importance of Commercial Trane Repair for System Longevity

The system we serviced was a Trane XB 13, Model 2TWA3060A3000AA, installed on the roof of a commercial property.

Service Call – “Unit Not Cooling”

The customer reported that the thermostat was set to cool, but the supply air remained warm. The indoor blower was running normally, which meant the problem was coming from the outdoor heat pump section.

Once we accessed the rooftop unit, we performed a full diagnostic. We checked power, capacitors, contactor function, refrigerant pressures, and compressor operation.

Right away, we noticed that the compressor was not turning on even though the system was calling for cooling.

Inspection Findings – Burned Compressor

After testing electrical components, checking continuity, and verifying that the compressor was receiving proper voltage, we confirmed the problem:

The compressor was burned out and completely failed.

This is a common issue in older R22 systems, especially commercial units that run long hours during the summer. When a compressor fails, the entire cooling cycle stops—resulting in warm air inside the building.

Because this was a commercial environment, downtime needed to be minimized. We contacted Trane and ordered a replacement OEM compressor matched specifically for the XB 13 system.

Repairs Performed

Once the new compressor arrived, we returned to the site to perform the full repair. Commercial compressor replacement requires several critical steps to ensure long-term reliability.

1. Removed the Failed Compressor

We safely re

covered all remaining R22 refrigerant, disconnected the burned compressor, and removed it from the rooftop heat pump. System contamination was checked to ensure no acid buildup or metal debris was present.

2. Installed the New Trane OEM Compressor

We installed the new factory compressor designed for this exact model. Proper mounting, brazing connections, and leak checks were performed to guarantee a correct installation.

3. Replaced the Filter Drier

Anytime a compressor is replaced, the filter drier must be replaced as well. This component captures moisture and contaminants inside the refrigerant circuit. Installing a new one ensures that the refrigeration system stays protected and operates efficiently after major repairs.

4. Pulled Deep Vacuum & Recharged System with R22

After all components were installed, we pulled a deep vacuum to remove moisture from the system. The heat pump was then recharged with the correct amount of R22 refrigerant. Accurate charging is essential for proper cooling performance and compressor life.

5. Full System Test

Once recharged, we verified compressor operation, checked superheat/subcooling, and ensured proper airflow and pressures. The Trane heat pump started cooling immediately and produced strong, stable temperatures.

Final Results

The building’s rooftop Trane XB 13 unit is now working well. It has a new compressor, a clean refrigerant circuit, and steady cooling. The replacement restored comfort to the occupants and prevented further risk of system-wide damage.

Commercial systems work hard. When a compressor fails, it is important to diagnose the problem correctly. It is also crucial to install components the right way. With proper repairs and testing, this Trane heat pump is now ready to continue operating reliably.