AC Leaking Water in San Leandro

AC Leaking Water in San Leandro

San Leandro stays mild near the bay and warms up as you move inland, so AC sees moderate use here. A lot of the housing is older single-story ranch stock, and many of those homes are on their second or third system sitting on original infrastructure. That combination, older equipment in a closet that was never built for easy service, is where most water leaks start.

Water at the indoor unit is almost always a drain problem, not a dead compressor. The AC removes humidity, the water collects in a pan, and it leaves through a drain line. On a system that's been in a tight San Leandro closet for fifteen or twenty years, that line is narrow, often flat, and full of buildup, and the pan underneath has had time to rust. Either one puts water on your floor.

None of that means a new system. It means a cleared line, a new pan, or a float switch that should have been there all along. We figure out which before we quote anything, and it goes on a written estimate.

Common causes

Clogged condensate drain line. On older closet installs the drain line is narrow and packed with years of dust and algae. The pan backs up and overflows under the closet door. We clear it with a wet vac and flush it, then add a cleanout tee so it's serviceable next time.

Rusted-through secondary drain pan. Common on systems past 15 years. The metal pan under the coil rusts at the low corner and water drips straight through instead of draining. We confirm the source by drying and running the system, then replace the pan.

No float safety switch. Many of these older San Leandro systems were installed without a float switch. That's the part that shuts the AC off before the pan overflows. We add one so a future clog becomes a no-cool call you catch immediately, not a floor full of water.

Frozen coil from a dirty filter or low charge. An R-22 system low on refrigerant, or a coil choked by a neglected filter, ices over and then melts more water than the pan can hold. We check filter and airflow, read the charge, and on a leaking R-22 system we run the replacement numbers because reclaimed R-22 is expensive to keep chasing.

Drain line run flat or back-pitched. Tight closet retrofits often left the drain line nearly level, so it holds water and clogs over and over. We re-pitch it for gravity drainage or reroute it to a better termination.

How we diagnose it

• Pull the closet panel and find where water actually originates: pan, line, or coil.
• Inspect the primary and secondary pans for rust-through and cracks.
• Clear and flush the condensate line, and add a cleanout tee where there's room.
• Confirm or install a float safety switch on the pan or secondary drain.
• On older R-22 systems, read the charge and filter condition to catch a frozen coil and price the repair-versus-replace honestly.

$75 diagnostic, credited toward any repair over $200. You get a written quote before any work begins.

AC Leaking Water in San Leandro: common questions

Nearby and related

AC Leaking Water near San Leandro: Oakland · Hayward · Castro Valley .

This is usually a ac repair in San Leandro job. See our ac repair overview or the San Leandro service area.