Why Your AC Is Leaking Water
Air conditioners naturally produce condensation as they pull humidity out of the air, and that moisture is supposed to drain away through a dedicated line. In Panama City's humid climate, that drain line can collect algae, dust, and debris over time, which slows or blocks the flow of water and forces it to back up into the unit or drip into your home.
A leak can also appear when the evaporator coil freezes over from restricted airflow — often caused by a dirty filter or low refrigerant — and then thaws faster than the drain pan can handle. In older systems, a cracked or rusted drain pan is another common culprit, letting water escape even when the drain line itself is clear.
Common Causes of an AC Leak
Several issues can lead to water appearing around or under your indoor unit. Here are the ones we see most often in Panama City homes.
Algae, dust, and debris build up inside the drain line over time, blocking water flow and causing it to back up into the unit or drip onto floors.
A clogged filter restricts airflow across the coil, which can cause it to freeze; when it thaws, the extra water can overwhelm the drain pan.
Low refrigerant can cause the evaporator coil to get too cold and ice over, leading to leaking once the ice melts faster than it can drain.
Older units may have a drain pan that has corroded or cracked, allowing water to escape even when the drain line is functioning properly.
If the indoor unit was not leveled correctly during installation, water may pool on one side of the pan instead of draining out as intended.
What to Do the Moment You Notice a Leak
Taking a few simple steps right away can limit water damage while you arrange for a closer look at the system.
Turn Off the System
Switch the thermostat to off so the unit stops running. This can help prevent additional water from being produced while the issue is checked.
Contain the Water
Place towels, a shallow pan, or a bucket under the leak to protect flooring, drywall, and any nearby furniture from ongoing water exposure.
Check and Replace the Filter
A visibly dirty filter is an easy first thing to inspect. Swapping it out may help if restricted airflow is contributing to the leak.
Signs It's Time to Call for a Repair Visit
Not every drip requires an emergency response, but these signs usually mean it's a good idea to have a technician take a look.
Not Sure What's Causing the Leak?
A short diagnostic visit from Riverstone HVAC Panama City can help pinpoint whether the issue is the drain line, coil, refrigerant, or pan before any repair work is scheduled.