Refrigerant leak detection: basic methods and correct diagnostic logic

When refrigerant loss is suspected, the goal is to identify the actual leak point before performing any recharge.

Electronic detector

A suitable detector for the specific refrigerant is used.

Bubble solution

It can help in identifying small leaks in accessible connections.

Nitrogen pressure

Under controlled conditions, it is used for leak testing after repair.

Best practice

Simply adding refrigerant without locating and repairing the leak is not considered a complete repair.