Commercial HVAC Ceiling Leak from a Clogged Condensate Drain in Austin, TX

July 29, 2026 — Austin, TX

Water coming through a ceiling tile is one of the few HVAC symptoms a tenant notices before the equipment does. Setpoint Services was called to an Austin office suite where water was leaking through the ceiling into occupied space below. The source turned out to be a clogged condensate drain line on a ceiling-mounted Trane air handler — and a secondary problem that explains why the safety device installed to prevent exactly this situation never tripped.

What We Found on Arrival

The auxiliary drain pan under the air handler was completely full of water. The condensate drain line serving the unit had blocked up, condensate backed into the pan faster than it could leave, and the pan overflowed the edge and ran down into the ceiling grid below.

That part is common. What made this call worth writing up was the second finding: the auxiliary pan had bent over time. The deformation created a low spot that let water collect underneath the height of the existing condensate float safety switch. The switch was installed, wired, and functional — it simply sat above the water line the sagging pan created. By the time the level was high enough to lift the float, the pan had already spilled over the low edge.

The Repair

• Cleaned the condensate drain line with commercial drain line cleaner and flushed it thoroughly to restore flow
• Removed the standing water from the auxiliary drain pan
• Tested the primary drain after the blockage cleared to confirm the condensate was moving where it was supposed to
• Attempted to relocate the condensate float safety switch to a position that would catch water earlier
• Adjusted the deformed pan as far as it would go to improve drainage as an interim measure
• Tested the air handler after service and verified normal operation and proper drainage before leaving

The float switch relocation could not be completed on this visit. The existing low-voltage wiring was too short to reach the better position, and pulling new wire is a separate scope. Rather than leave the switch in a spot we already knew was ineffective and call it done, we documented it and quoted the permanent fix.

Water coming through your ceiling? Call 512-992-5537. Setpoint Services runs 24/7 emergency service across Austin and the surrounding area, and a condensate overflow is the kind of call where every hour adds to the damage.

Where the HVAC System Ends and the Building Plumbing Begins

There was a third finding worth flagging for any facility manager in a multi-tenant building. The condensate discharge from this unit ties into a separate building drain, and that drain appears to be partially restricted on its own. That line is part of the building’s plumbing system, not the HVAC equipment — it is outside what an HVAC contractor is licensed to open up and rod out.

We recommended a licensed plumber if drainage problems continue. This distinction matters more than it sounds like it should. A tenant who keeps paying for condensate drain cleanings on a system that drains into a restricted building line will keep having the same problem on a schedule, because the equipment was never the bottleneck.

A Note on Water-Source Systems

This Trane air handler is part of a building water-source HVAC system running on a chilled water and cooling tower loop — a common configuration in Austin office and medical buildings, where a central plant handles heat rejection and individual units serve each tenant space. These systems are efficient and quiet, but the ceiling-mounted air handlers that serve each suite live directly above finished space. When drainage fails on a rooftop unit, water usually finds the roof drain. When it fails on a ceiling-mounted unit, it finds someone’s desk.

That is why overflow protection on ceiling-mounted equipment deserves more attention than it typically gets. A float switch is only as good as its position relative to the water, and a pan that has been carrying condensate for a decade is not the same shape it was when it was installed.

What We Recommended

• Replace or relocate the condensate float safety switch and run new low-voltage wiring so the switch sits where it will actually catch a rising level
• Replace the bent auxiliary drain pan to restore proper overflow containment
• Have the building plumbing drain inspected by a licensed plumber if drainage issues recur
• Put the unit on scheduled preventative maintenance so the drain line gets cleared before it blocks rather than after

Routine condensate drain maintenance is one of the cheapest line items on a commercial HVAC service agreement and one of the most expensive to skip. Ceiling damage, saturated insulation, mold remediation, and an unplanned shutdown all trace back to a drain line that took twenty minutes to clear.

Commercial HVAC Repair Across the Austin Area

Setpoint Services is a Texas-licensed commercial refrigeration and HVAC contractor (TACLA00116720C) based in Pflugerville. We handle commercial HVAC repairs, system installations, water chiller service, and scheduled maintenance contracts for office buildings, restaurants, retail, medical facilities, and shared kitchens. On the HVAC side we are factory authorized for Daikin, Goodman, Carrier, and York, and we service every major brand of rooftop, split, packaged, and ceiling-mounted equipment.

Call 512-992-5537 or visit our contact page for commercial HVAC service across Austin, Pflugerville, Round Rock, Georgetown, Cedar Park, Leander, Hutto, Taylor, Kyle, Buda, Jarrell, Temple, Belton — and surrounding Austin Area communities.

Setpoint Services — commercial refrigeration and HVAC across the Austin Area.