AC Leak and Drain Line Repair

AC leak repair in Houston usually means a clogged drain line. Water backs up into the pan, spills, and stains the ceiling. We clear it, fix the cause and add a float switch so it shuts off before it spills again.

Signs of an AC leak or clogged drain

  • A wet stain or drip on a ceiling under the attic unit
  • Water in the drain pan or on the closet floor
  • The AC shuts off by itself and a float switch is tripping
  • A musty smell near the air handler
  • Water pooling by the outdoor line or in the garage
  • Ice on the indoor coil that melts into a puddle
  • Mold or mildew around the vents
  • The drain pipe by the house stays dry all day while AC runs

How an AC leak repair works

  1. 1Stop the waterShut the AC off at the thermostat so the pan does not keep filling.
  2. 2Find the sourceThe tech checks the drain line, pan, coil and connections to see where the water is coming from.
  3. 3Clear the lineHe flushes and vacuums the condensate line and treats it to slow algae.
  4. 4Add protectionA float switch and a secondary drain pan are installed if missing.
  5. 5Check for damageHe checks insulation and ceiling for wet spots and tells you if a drywall pro is needed.

AC leak and drain repair options and costs in Houston

Drain line clearing$100–$300 (typical)

Flush or vacuum the clog. Often the whole fix.

Float switch$145 (our price)

Shuts the AC off if water backs up. Cheap insurance for an attic unit.

Secondary drain pan$285 (our price)

Replaces a rusted pan and catches leaks before they reach the ceiling.

Coil or line repair$500–$2,500 (typical)

A cracked coil or refrigerant leak is a bigger job and may lead to a replacement quote.

Typical Houston ranges for planning. Your written price comes after we see the job.

What changes the price

  • How far the water traveled and how much damage there is
  • Whether the unit is in the attic, closet or garage
  • Rusted pans or cracked pipes
  • Whether a float switch already exists
  • Drywall repair, which is a separate trade

See the full cost guide →

Good to know in Houston

Houston’s humidity can make an AC produce several gallons of water a day, so a drain that is slightly slow can overflow fast. Attic units sit above living rooms, so a small leak becomes a ceiling stain. Algae grows in drain lines year-round, which is why quarterly treatments help.

Questions about leaks and drain lines

Why is my AC leaking water inside?

A clogged condensate drain is the most common reason. A rusted pan, a frozen coil or a cracked drain pipe can also cause it.

Can I clear the drain myself?

You can pour a cup of vinegar down the access tee, but a wet-vac or flush is more reliable. If water keeps returning, call us.

Will insurance cover ceiling damage?

Some homeowner policies cover sudden water damage but not slow leaks. Call your insurer and take photos.

How often should I treat the drain?

Every 3 months in Houston is a good habit. Comfort Club Plus members get it each visit.

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