A/C refrigerant system, servicing
http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Next&type=repair&id=...
Fig. 3
Pressure relief valve,
checking
Function: Protects refrigerant
circuit from excessive pressure.
The pressure relief valve shows
whether valve has opened. An
adhesive sticker is pushed out.
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13/2/2005