What the drain pan does
The drain pan collects condensation from the coil and directs it to the condensate drain. Dust and debris can collect in the area over time, especially when the system is used regularly.
Useful warning signs
Note water dripping from the indoor unit, visible sludge in accessible areas, a recurring musty odour or unusual gurgling. These details help distinguish a maintenance concern from a repair or installation issue.
Cleaning is not a universal repair
A leak can also have mechanical, installation or drainage causes. A professional clean can include checking the accessible drain area, while a technician should explain any issue that falls outside cleaning scope.
The practical takeaway
A leaking air conditioner needs attention. The goal is to identify the condition found and choose the right fix, not promise that cleaning solves every leak.