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AC Not Cooling After Gas Refill — What Went Wrong?

If your AC is not cooling after a gas refill, the gas was likely underfilled, the wrong type was used, or a leak was not properly fixed before refilling.

Data Verified: 2026

A gas refill only works if the leak causing the gas loss was fixed first. If the technician refilled gas without finding and repairing the leak, the new gas will escape within days or weeks. Ask your technician if a leak test was done before and after refilling.

Underfilling is also common — some technicians add minimal gas to save costs. The correct gas charge depends on your AC model and pipe length. Your service receipt should show the exact weight of gas added and the final operating pressure readings.

Also verify the correct refrigerant type was used — R22, R32, and R410A cannot be mixed or substituted. Using the wrong type can actually damage the compressor. Check your AC's nameplate for the specified refrigerant.

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Frequently Asked Questions

Why is my AC still not cooling after I paid for gas refill?

Most likely the leak was not fixed before refilling, or the gas was underfilled. Ask for pressure readings from before and after the refill to verify proper filling.

How long should cooling last after a proper gas refill?

If the leak was properly repaired, a gas refill should last the AC's entire remaining lifespan — 5–10+ years. If gas runs out again within months, the leak was not fixed.