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Why Your A/C Freezes Into a Block of Ice

Ice on the lines means airflow or refrigerant — here's the difference, what you can fix, and what needs a gauge set.

Counterintuitive but true: an air conditioner freezes because something is wrong, not because it's 'extra cold.' The two causes are starved airflow (dirty filter, blocked returns, failing blower) or low refrigerant from a leak.

What you can do: shut the A/C off and run the fan to thaw it (hours, not minutes), replace the filter, open every vent, and try again. If it re-freezes, it's refrigerant — and that needs gauges, a licensed tech, and a leak found, not just a top-up.

Repeated top-ups on an old unit with a phased-out refrigerant is money down the drain; that's usually the moment the repair-or-replace math flips. We'll show you both numbers on the same visit.

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