Reasons to request leak testing
- Cooling fades after previous refrigerant service.
- Residue, damaged components, or charge assessment raises concern about loss from the circuit.
Leaks vary by condition
Connections, seals, hoses, condenser surfaces, compressor areas, or an evaporator can leak. Some faults are difficult to reproduce because they depend on temperature, vibration, or pressure. A negative result from one check does not guarantee that an intermittent leak is absent, and oil residue alone is not always conclusive.
How the investigation is selected
The system's refrigerant and service history guide an appropriate detection method. Visible inspection and suitable professional leak-testing techniques may be combined to narrow the location. Findings should distinguish a confirmed leak from an area requiring further observation. After repair, the circuit needs the applicable evacuation, recharge, and verification steps.
Help preserve useful evidence
Tell D&S how quickly cooling deteriorates and what products were previously added. Sealant can complicate service and should be disclosed. Do not intentionally release refrigerant or repeatedly top off an unresolved leak. Ask what was found and how the proposed repair will be checked afterward.