Why This Midwest City, OK Air Conditioner Was Leaking Water

An air conditioner that leaks water feels like a plumbing problem, but it almost never is. A homeowner in Midwest City, OK found a mess around her indoor unit and called Paschal. Our technician Jason found a frozen coil and a drain line that was not carrying water away the way it should, cleaned it up, and left everything dry.

Here is the short version. Your AC produces water on purpose. It pulls humidity out of the air, that moisture condenses on the coil, and it drains outside. When the coil freezes or the drain line clogs, that water ends up on your floor instead.

Where the water actually comes from

The evaporator coil is the cold part of your system, and warm humid air passing over it leaves moisture behind, the same way a glass of iced tea sweats on a summer afternoon. On a humid Oklahoma day, a home system can pull several gallons out of the air. All of it runs into a drain pan and out through a condensate line. That line is usually a piece of PVC about the width of your thumb, and it is the part most likely to cause trouble, because the same dark damp conditions that make it work also make it a nice place for algae to grow.

Two problems that look identical from the floor

• Clogged condensate line. Algae or debris blocks the pipe, the pan fills, and water spills over the edge. Many systems have a float switch that shuts the unit down before this happens, which is why some homeowners notice the AC quitting before they notice the water.
• Frozen evaporator coil. Restricted airflow or a low refrigerant charge lets the coil drop below freezing. Ice builds up, the system stops cooling well, and when it finally melts it dumps more water at once than the drain can handle.

The tell is usually whether the system is still cooling. A pure drain clog cools fine until the float switch trips. A frozen coil means the air coming out of your vents got weak and warm first.

What happened on this visit

Jason got out there quickly, sorted out the drain on the coil, and put everything back together. The homeowner went from standing water to a dry, working system in one visit.

“Thanks Jason for your quick trip to my house to fix the drain pipe on my a/c coil. Yikes, it was a mess. Glad its all back together and everything is dry and working! Thank you for being there! Nice to know there is someone to call and help fix it.”

– Kim R., Midwest City, OK

How to keep it from happening again

Change your filter on schedule, because a dirty filter is the fastest route to a frozen coil. Keep return vents clear of furniture and rugs. Have the condensate line flushed as part of an annual visit rather than waiting for it to back up. And if the system ever ices over, shut it off and let it thaw before running it again, because running a frozen system just makes it worse. Our air conditioning services page covers what a full maintenance visit includes.

Maintenance that catches this first

This homeowner is on our Planned Protection Membership, which is how a lot of our customers stay ahead of surprises. Plans start at $8.99 a month for Essential, and SmartGuard is $34.99 a month, which includes a yearly HVAC maintenance visit plus two more visits you can spend on HVAC, plumbing, or electrical, 15% off any repair, priority scheduling, and a $29 service call instead of $89. It also builds $10 a month in Comfort Credits you can put toward a future system, water heater, or panel replacement.

What it costs

A Paschal HVAC diagnostic and service call is $89, and that fee is free when you move forward with a same day repair. Repairs are quoted as a flat, upfront price you approve before any work begins. A seasonal AC tune-up, which includes clearing the condensate drain, is $159. If you are weighing a larger repair against replacement and want a second opinion on a quote, our free price check is available at no cost.

Frequently asked questions

Why is my air conditioner leaking water inside?

The most common cause is a clogged condensate drain line. Your evaporator coil pulls moisture out of the air, and that water has to drain away. When the line backs up with algae or debris, the pan overflows. A frozen coil that melts all at once will do the same thing.

What makes an evaporator coil freeze up?

Restricted airflow or low refrigerant. A dirty filter, blocked return, or failing blower starves the coil of warm air, and a low refrigerant charge drops the coil temperature below freezing. Either way, ice forms and then melts into water where you do not want it.

Can I clear an AC drain line myself?

You can try. Shut the system off, find the drain line access near the indoor unit, and use a wet vacuum at the outdoor end of the line to pull the clog through. If it comes back quickly, or if you find standing water in the pan, the underlying cause needs a technician.

How much does it cost to fix an AC leak?

A Paschal HVAC diagnostic and service call is $89, and that fee is free when you move forward with a same day repair. The repair is quoted as a flat, upfront price you approve before work begins.

Does Paschal service my area?

Yes. Paschal Air, Plumbing & Electric serves Midwest City, Oklahoma City, Edmond, and the surrounding communities. Check your city on our service areas page, or see what we offer in Midwest City.

Water where it should not be?

If you are finding water around your indoor unit, or the system keeps shutting itself off, get it looked at before it reaches drywall or flooring. Schedule with Paschal Air, Plumbing & Electric and get a clear diagnosis and an upfront price. Call 405-727-5300 or request service online.

Pricing note: This story was published in July 2026. Starting prices, promotions, and market ranges change over time and may no longer be current. Contact Paschal for an up-to-date, upfront quote for your home.