Published 17 May 2026 · 3 min read
No — a properly functioning, well-sealed AC should not need a gas refill every year. If your AC genuinely needs refilling annually, that's a sign of a slow leak that should be found and fixed, not treated as routine maintenance.
Some technicians recommend an annual top-up as a blanket routine, partly because it's an easy add-on sale and partly because checking gas pressure properly and leak-testing takes more time than just topping it up and moving on. It's become normalized in parts of the industry, but it's not how a correctly functioning sealed system is supposed to work.
Refrigerant should be checked during routine service, and only refilled if the pressure reading shows it's genuinely low. If it is low, the next question should be why — and that means a leak test, not just adding gas and hoping it holds until next year. A leak found and fixed properly means you shouldn't need another refill for years, not months.
Paying for a refill without fixing the underlying leak means paying for the same top-up again in a few months, plus the extra electricity cost of running an AC on low refrigerant in between, plus added wear on the compressor. The leak check itself usually costs far less than repeating this cycle every year indefinitely.
No — that's a common misconception. A properly sealed system shouldn't lose refrigerant under normal use, so a genuine annual need for refilling points to an unfixed leak.
Ask whether a pressure check and leak test were actually done, or whether the refill is being suggested as routine practice regardless of the actual gas level.
Several years, typically — refrigerant loss after a proper leak repair should be minimal to none under normal use.
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