AC Leaking Water in Portola Valley

AC Leaking Water in Portola Valley

As the system cools, it pulls moisture from the air, collects it in a pan, and drains it away. When you find water near an indoor unit, that path has failed somewhere along the way. The line clogged. The pan cracked. Either the pump failed, or the float switch meant to catch that got stuck. In nearly every case it is a repair to that one part, not a reason to replace the system.

What is different here is the ground and the systems these homes run on. Larger properties off Alpine Road and Portola Road sit on wooded acreage, and toward Skyline some of the outer-road homes are on septic and well setups rather than municipal service. That changes where a condensate line should discharge, since running it into or near a leach field is the wrong answer even when the line itself is clear. Oak and redwood cover on these lots also drops leaf litter and duff over outdoor terminations, which buries a discharge point the same way it does anywhere else in these hills.

The climate stays mild through the oak and redwood hills, but a large home running its system all summer still moves real water through these lines. On a property with more than one air handler across the floors, the first step is always finding which unit is actually leaking before we talk about anything else.

Common causes

Clogged condensate line on a long, low-slope run. A line reaching from an upper-floor or attic air handler down to a discharge point on a wooded Portola Valley lot often ends up long and barely pitched, and it clogs faster because the water moves through it so slowly. Using a wet vac at the termination, we clear the blockage, flush it back through, and verify it drains properly. Where the routing itself is the problem, we will flag a re-route on the estimate.

Blocked outdoor termination under leaf litter. Under oak and redwood cover, a drain line often discharges into duff and loose soil that washes back over it. A buried termination backs the whole line up. We locate and clear the discharge point, and on properties with septic systems we make sure it is not discharging anywhere near the leach field.

Cracked or overflowing drain pan. When the line clogs or the pan itself cracks, water spills out of the air handler. We check both the primary and secondary pans, clear the secondary drain, and replace any pan that's cracked or corroded. On upper-floor units this pan is what protects the ceiling below.

Failed condensate pump. Where grade or layout on a hillside property makes gravity drainage impractical, a condensate pump lifts the water to a point it can drain from. A failed pump motor or a stuck float floods the unit. We test the pump by filling its reservoir and replace it if it will not run.

Stuck float safety switch. The float switch should shut the system off once the pan fills. Stuck open, it lets the unit keep running and overflowing. We test it under a rising water condition and replace it if it is not cutting the circuit, then confirm it actually stops the unit.

Frozen evaporator coil. A coil iced over from low refrigerant or poor airflow sheds a flood of water once it thaws. We read pressures and coil temperature to find why it froze. On the zoned systems common in these larger homes, a stuck damper choking one branch is a frequent culprit.

How we diagnose it

• Determine which of the property's systems is leaking and locate the affected air handler.
• Trace the full condensate path, including any long wooded-lot run and the outdoor termination, for clogs and blockage.
• Both primary and secondary pans and drains get inspected and cleared, with free drainage confirmed.
• We test the condensate pump and float switch to pin down which component failed.
• Check refrigerant charge, airflow, and zone damper operation to rule out a frozen coil, and confirm the drain does not discharge near a septic leach field.

$99 diagnostic, credited toward the repair. You get a written quote before any work begins.

AC Leaking Water in Portola Valley: common questions

Nearby and related

AC Leaking Water near Portola Valley: Woodside · Menlo Park · Los Altos Hills .

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