Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Visual and Physical Check






Visual and physical check

Large and slow leaks will often result in air conditioning (A/C) compressor oil being drawn out with the refrigerant.
A visual inspection can localize the point where the oil gathers and identify the source of the leak.
- Check the system for corrosion which could cause refrigerant to leak
- Check that there are no loose components.