When the A/C is re-gassed there is oil added into the system, if you use the A/C the oil circulates and helps prevent the seals from drying out therefore preventing leaks. If it's not used the seals will dry out and eventually leak the R134a out into the atmosphere
A/C is like XC90 the parking brake... use it or loose it
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MY2010 XC90 SE (M66-manual) Magic Blue (467) Sold
MY1997 850 GLT (62,000 miles) Silver Sand (419)
MY2005 V70 2.5T (66,000 miles) Willow Green (471)
Volvo 850 GLT website
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