Condensate Leak in the Attic in Menlo Park

Condensate Leak in the Attic in Menlo Park

Menlo Park has some of the mildest summers in the Bay Area, with design cooling temperatures rarely topping the mid-80s even during a heat spell. That keeps AC runtime low, which is good for your power bill and oddly hard on your condensate drain. Low runtime means the line gets used in short bursts and then sits. A partially clogged drain on a system that runs a few hours a week can go a whole season without overflowing, then dump into the emergency pan the first week it actually gets hot.

Most of the attic-handler installs we see here are in the substantial 1960s through 80s custom homes in Sharon Heights and West Menlo Park, plus newer townhomes with packaged or air-handler setups. The water from the coil has to drain somewhere, and when the primary line plugs, the safety pan and float switch are the only things standing between a clog and your ceiling. On the older custom homes those backups are often original and sometimes missing entirely.

This is almost always a one-part fix. A drain clog gets cleared and flushed. A failed condensate pump or a missing float switch is an inexpensive component. The version that hurts is the leak nobody caught, where the plaster ceiling soaked through. We find which one you have first, then quote it. The $75 diagnostic gets credited toward the repair if it runs over $200.

Common causes

Drain line clogged after sitting idle. Low-runtime systems still grow biofilm in the drain, and the line gets a real workout only on hot days. We vacuum the termination, flush from the coil, and verify a clean continuous run so the next heat spell does not back up again.

Failed condensate pump on a closet or attic handler. Where the handler cannot drain by gravity, a small pump lifts the water out. When the pump's float sticks or the motor dies, the reservoir overflows. We test the pump by pouring water into the reservoir and confirming it kicks on and discharges. A dead pump gets replaced rather than rebuilt, since the rebuilt ones fail again.

Float switch missing or bypassed. On older Sharon Heights installs we sometimes find no safety float at all, or one that was jumpered out during a past service call. That removes the last line of defense before the ceiling. We test the switch and, if it is absent, write the cost of adding one into the estimate. It is the cheapest part on the system and the one that saves you the most.

Cracked primary drain pan under the coil. Decades-old coil pans corrode or crack and let water bypass the drain. We inspect with a light and mirror. A cracked pan gets replaced, since coatings and patches on a coil pan do not last a season.

Flat or back-pitched drain line. A line that runs level or dips holds water and overflows at the coil. We check the pitch with a level and re-hang the run so it falls steadily toward the outlet.

How we diagnose it

• Identify whether the handler drains by gravity or through a condensate pump before chasing the leak.
• If there is a pump, test it by filling the reservoir and confirming it switches on and discharges.
• Confirm a float switch is present and actually de-energizes the system when triggered.
• Vacuum and flush the primary drain, then watch for a clean run at the termination.
• Inspect the primary pan and secondary pan for cracks and corrosion.

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

Condensate Leak in the Attic in Menlo Park: common questions

Nearby and related

Condensate Leak in the Attic near Menlo Park: Palo Alto · Los Altos .

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