AC gas is not interchangeable. Older systems may use R22, while many newer inverter units use R32 or R410A. The unit's rating label, usually on the outdoor unit, is the safest place to check the specified refrigerant. Using the wrong gas or mixing refrigerants can reduce cooling, damage components, and create a costly repair.
Gas refilling should follow a diagnosis, not a guess. A correct visit checks for a leak, the condition of the copper lines, pressure readings, and whether the system was evacuated correctly. If cooling dropped suddenly, there may be a leak that needs repairing before a recharge. Ask the technician to identify the gas type and explain the quote before work begins; this makes comparisons between AC service quotes far more meaningful.
Avoid the common gas-refill mistake
A refrigerant top-up without a leak check may restore cooling briefly but does not explain why gas was low. Ask for the AC's specified gas type, a leak inspection, and a clear quote. If a technician cannot identify the gas from the rating plate, pause before approving the work.
Maintained and updated by the SuperFixer home services team in Lahore.