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

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Safety Devices

A/C Refrigerant System R-12, Safety Devices

Pressure relief valve, protects A/C system against excessive pressure

If pressure relief valve -arrow- has opened,
- Check system for cause of excessive pressure, repair as necessary