Does a car need Freon refill?

[Ana]

Cars do not require annual Freon refills. The need for Freon replenishment in a car's air conditioning system is determined by cooling performance rather than time. Here are the relevant scenarios for Freon refills in cars: 1. If the air outlet temperature cannot reach below 16°C, a Freon refill is needed. 2. If the outlet reaches below 16°C but takes excessively long (e.g., still not cooling after 5-6 minutes), refill is required. 3. During normal AC operation, continuous bubbles in the sight glass indicate insufficient Freon. 4. When no bubbles appear during normal operation nor brief bubbles when shut off, this signals excessive Freon requiring release.