2026-04-08 · AC Repair Tuscaloosa
Why Your AC Freezes Up in Alabama's Humidity (And How to Fix It)
It is 96° outside, your AC is running nonstop — and somehow there is a block of ice inside it. Welcome to one of the most common summer calls in Tuscaloosa.
Why Coils Freeze in Hot, Humid Weather
Your evaporator coil gets cold by design — around 40° in normal operation. Two things push it below freezing: restricted airflow (dirty filter, closed vents, failing blower) and low refrigerant from a leak. Alabama's humidity makes both worse: every bit of moisture in that heavy air condenses on the coil, and once surface ice starts, it snowballs fast.
What To Do Right Now
- Turn the system OFF at the thermostat — running it frozen can kill the compressor
- Switch the fan to ON to speed the thaw (2–4 hours typically)
- Check and replace the filter if it is dirty
- Put towels near the air handler — the melt-off can overwhelm the drain
When It Keeps Happening
If the coil refreezes with a clean filter, you almost certainly have a refrigerant leak. That is not a DIY fix — and in our experience around Tuscaloosa, repeating freeze-ups usually trace to a slow leak that has been quietly draining the system for months. A proper leak search and repair beats three "recharges" a summer, every time.