Condensate Leak in the Attic in Livermore

Condensate Leak in the Attic in Livermore

Air conditioning pulls water out of the air. It collects in a pan under the evaporator coil and drains away through a primary line. When that line clogs, the pan overflows, and on an attic install the water comes down through the ceiling. The more the system runs, the more water it makes, which is why this shows up faster in Livermore than in the cooler Bay Area towns.

Livermore summers get genuinely hot, and the AC carries real load for months. A unit that runs that many hours produces condensate continuously, so a drain line that's starting to clog doesn't trickle, it floods. We see this most in July and August on attic and closet installs across the older tracts. Almost every time it traces back to one fixable part: a plugged line, a float switch that didn't cut the system, a failed condensate pump, or a pan that's cracked or sloped wrong.

Heavy runtime also wears the safeties harder. The float switch and the emergency pan under the air handler are the last line before drywall damage, and on a system that runs all summer they get tested constantly. When they fail, a clog that would have been a slow problem in a coastal town becomes a wet ceiling in a Livermore week.

Common causes

Clogged primary condensate line. Algae and sludge build inside the drain and block it, and with the volume of water a Livermore AC produces in summer the pan overflows quickly. We clear the line with a wet vacuum from the termination, flush it, and pour water through to confirm flow. We add a cleanout tee where the line doesn't have one so it's serviceable next season.

Float switch that never tripped. The safety float should shut the AC down when water rises, but a stuck, missing, or miswired switch lets a system that's running hard keep filling the pan. We lift the float to confirm the system cuts out, and install one where a heavily-used attic unit has none.

Failed condensate pump. When an attic unit sits below its drain exit, a small pump lifts the water out, and long summer runtime is hard on those pumps. A burned motor or stuck float means the reservoir overflows. We power-test the pump, check its check-valve, and replace it if it can't keep up with the condensate the system makes.

Cracked or rusted primary pan. On an older tract-home system the pan can crack or corrode through and leak straight to the ceiling even when the drain is clear. We inspect it with a light and mirror, confirm it holds water, and replace any pan that's failed.

Drain line undersized for the runtime. A marginal drain that coped in a mild climate can't always keep up with the water a Livermore system produces on a hot afternoon. We check the line size and slope and re-route or upsize it where the volume is genuinely outrunning the drain.

Emergency pan filling up. The secondary pan is the last barrier before your ceiling. Finding water in it means the primary already failed, and in Livermore's heavy-runtime conditions it can fill in a hurry. We treat it as the alarm it is, fix the primary cause, and confirm the float switch will shut the system down next time.

How we diagnose it

• Pour water through the primary pan to separate a clogged line from a cracked or mis-sloped pan.
• Test the float switch by lifting the float and confirming the system shuts off under load.
• Clear and flush the primary drain line, then verify flow at the termination.
• Check the condensate pump under power, including its float and check-valve, on units that have one.
• Inspect both pans for standing water and confirm the secondary can catch an overflow.

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

Condensate Leak in the Attic in Livermore: common questions

Nearby and related

Condensate Leak in the Attic near Livermore: Pleasanton · Dublin .

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