Service function guideAir Conditioning Bad Smell Treatment

This guide covers the complete process for eliminating musty odours from a vehicle's air conditioning system and restoring proper condensate drainage, written for both competent DIY owners and working mechanics. It explains how the system creates smells, how to prepare the workspace, and the full step-by-step treatment from drain clearing to evaporator cleaning and cabin filter replacement. You will learn to verify the repair with airflow and drain measurements, adapt the method to different vehicle layouts, and avoid the mistakes that cause smells to return. After finishing, you will be able to diagnose the source of the odour, carry out the treatment safely, and set the owner up with aftercare that keeps the system fresh.