AC Leaking Water in Orinda

AC Leaking Water in Orinda

AC leaking water means the condensation your coil pulls out of the air is overflowing instead of draining away. The water collects in a pan and exits through a drain line. Clog that line, crack the pan, or lose its slope, and the water shows up on a ceiling, in a closet, or down a wall.

Orinda makes this worse than the cooler bayside towns. The hills shelter it from the bay breeze, so summers here run hot and AC systems carry real load for hours at a stretch. More runtime means more condensate moving through the drain, which means a marginal line clogs sooner and overflows harder. On the older hillside custom homes here, the air handler is often tucked in an attic with a long horizontal drain run to reach an exterior wall, and that long, low-slope run is exactly where algae builds up and water backs up.

A leak is still almost always one fixable part. The hillside framing just makes routing and access something we scope carefully rather than rush.

Common causes

Clogged condensate drain line. The long horizontal drain runs common in Orinda attic installs hold water and grow algae, which eventually blocks the line. With more summer runtime here, they clog faster. We vacuum the line at its termination, flush it from the top, and check the trap so it drains cleanly under load.

Drain line slope lost to settling. On decades-old hillside framing, a drain line can lose its downhill pitch as the structure settles, so water sits in a low spot and eventually overflows. We trace the full run, re-support or re-slope the sagging sections, and load-test until water clears every time.

Overflowing or cracked drain pan. Years of heavy summer use age the pan. A metal pan rusts or a plastic secondary pan splits, and water drips through the ceiling below. We inspect both pans, determine whether the pan or the drain is the source, and quote the correct repair rather than patching a pan that will leak again.

Frozen coil from heavy runtime. Systems pushed hard through an Orinda heat stretch will freeze the coil if refrigerant is low or the filter is choked, then dump water when they cycle off. We check the charge on gauges and inspect airflow. The leak is the symptom. The freeze is the problem we actually fix.

Failed or absent float switch. An attic unit should shut off on a float switch before an overflow hits your ceiling. Many older Orinda homes either lack one or have one that stuck. We test it and recommend adding a switch where there is none, cheap insurance against drywall damage in a finished hillside home.

How we diagnose it

• Access the attic air handler and inspect the full drain run, both pans, and the slope of the line end to end.
• Pour water through the pan to confirm the drain carries it, then clear and flush any line that backs up.
• Check refrigerant charge and filter, since heavy Orinda summer runtime makes a frozen coil a real suspect.
• Test the float switch or flag its absence on older systems.
• Scope access and routing for any pan or line replacement, then put the cause and cost on a written estimate before work, with the $75 diagnostic credited toward repairs over $200.

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

AC Leaking Water in Orinda: common questions

Nearby and related

AC Leaking Water near Orinda: Lafayette · Moraga .

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