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Model Year Affected: 1994
A hum or moan can be heard when the AC is turned on if the system is not charged with the correct amount of 134a refrigerant (.9 kPag or 32 oz).
Q&A > Jeep > 1999 Jeep Wrangler
Common Problems > Jeep Wrangler
Q&A > Jeep > 1993 Jeep Wrangler