AC Leaking Water: Causes, First Steps and Help With the Water Damage

An AC leaking water often points to a clogged condensate drain, a frozen evaporator coil or a cracked drain pan. Turn the system off, catch the drip and have an HVAC technician fix the unit. DisasterPRO Restoration, based in Kent, WA, handles the water damage a leak leaves behind in Kent, Renton, Tacoma, Fife and Seattle, WA. AC repair is not a confirmed service, so ask when you call.

Why an AC leaks water: the common causes

An air conditioner leaking water inside the house is often a condensate problem, not a refrigerant leak. As the indoor coil cools the air, it pulls moisture out of it. That moisture drips into a drain pan and leaves through a drain line or a condensate pump.

When any part of that path fails, water can end up on the floor, in a ceiling below the air handler, or inside a wall. The table groups the causes that HVAC manufacturers commonly list. It shows the signs a homeowner may notice and who normally handles the fix.

Water dripping outside near the condenser on a warm day can be ordinary condensation on the refrigerant line. Water collecting indoors is the part that needs attention.

What to do when an AC is leaking water: first steps (general guidance)

When an AC is leaking water indoors, the first job is to keep more water away from floors, ceilings and walls. The steps below are general homeowner guidance. They are not a description of DisasterPRO Restoration's process.

Only do what you can do safely from a dry spot. Water and electricity near an air handler or furnace cabinet are a real hazard. For more on protecting a room before help arrives, see what to do after water damage before cleanup.

• Turn the system off at the thermostat. If water is near electrical parts, switch off the breaker for the air handler, but only if you can reach the panel without standing in water.
• Put a bucket or towels under the drip. Move rugs, boxes, electronics and furniture out of the wet area.
• Check the air filter and replace it if it is visibly clogged.
• Look at the drain pan and the condensate pump. If the pan is full, remove the water carefully with a wet/dry vacuum or towels.
• Find where the drain line exits the house. If you can reach it safely, a wet/dry vacuum on the outside end can sometimes pull out a clog.
• If the coil or refrigerant lines are iced, leave the cooling off so the ice can melt. Keep towels under the unit while it thaws.
• Photograph the unit, the wet floor, any ceiling stain and damaged belongings before cleanup, for a possible insurance claim.
• Call an HVAC technician for the unit. Call a water damage company if water reached drywall, flooring, insulation, a ceiling or a crawlspace.

Can you keep running an AC that is leaking water?

Running an AC that is leaking water is generally not a good idea until the cause is found. Every hour of cooling sends more condensate toward the leak. If the coil is frozen, running the system can also add more ice and more meltwater later.

An AC leak becomes urgent when water is coming through a ceiling or running near outlets or the electrical panel. It is also urgent when water is soaking into carpet, subfloor or drywall. A slow drip into a bucket can usually wait for a scheduled HVAC visit, as long as someone empties the bucket and watches the area.

Water and refrigerant leaks look different. Condensate is clear and odorless, like tap water, and it collects near the indoor unit or along the drain path. Refrigerant normally escapes as a gas, so you will not see a puddle. Instead, the signs are weaker cooling, ice on the lines, a hissing sound or oily residue at fittings, and only an HVAC technician should handle it.

An AC that leaks water but still cools often has a drainage problem rather than a cooling problem. The coil is doing its job, but the water is not leaving through the pan and line as it should. An AC that leaks after it is turned off may have a frozen coil melting, or a pan that filled up while the system ran.

Some systems have a float switch that shuts the unit off when the drain pan fills. Some homeowners also add a water leak sensor near the air handler, and certain smart thermostats can connect to one. Ask the HVAC technician whether your system has a float switch and whether it works.

HVAC technician or water damage company? A decision checklist

An AC leaking water can need two different trades. An HVAC technician fixes the unit. A water damage restoration company dries and repairs whatever the water reached. Fixing the drain line stops new water, but it does not dry a soaked subfloor or the wet insulation above a ceiling.

DisasterPRO Restoration lists water extraction, drying, mold remediation, sewage cleanup, crawlspace work and rebuild after damage among its services, including water damage repair. Repairing the air conditioner itself is not confirmed among them, so ask when you call. Use the checklist below to decide who to call first.

• Call an HVAC technician when the water is contained to the drain pan or a small spot under the unit, the coil is iced, the pump has stopped, or cooling has weakened.
• Call a water damage company when water came through a ceiling or ran down a wall.
• Call a water damage company when drywall feels soft, has a growing stain, or baseboards are swelling.
• Call a water damage company when hardwood is cupping, laminate or vinyl is lifting, or the carpet pad is wet.
• Call a water damage company when water ran into a crawlspace or under the floor.
• Call a water damage company when you do not know how long the leak has been going on.
• Call a water damage company when a musty smell shows up near the unit. A smell alone does not prove mold, but it can be a reason to check for hidden moisture.
• Call both when the unit is still leaking and building materials are already wet.

How DisasterPRO Restoration handles AC leak water damage in King and Pierce County

DisasterPRO Restoration was founded in 2018 in Kent, WA, by people with backgrounds in both mitigation and remodeling. The company takes emergency calls 24 hours a day in King and Pierce County and also serves Kitsap County. According to the company, a crew is dispatched right away and aims to arrive within 60 minutes anywhere in Greater Seattle.

The company offers a free inspection with no obligation. After an on-site assessment, it provides a detailed written estimate. It states that it is IICRC certified.

For drying, DisasterPRO Restoration uses commercial dehumidifiers and air movers. It checks moisture levels daily until the home is completely dry. During mold inspections, the company uses moisture meters and infrared cameras to find hidden water intrusion.

If moisture from a long-running leak led to mold, the company's approach is to find the source, contain the spread, remove what is there and work to keep it from returning. If water reached a crawlspace, the team works in spaces as tight as 18 inches.

Once the structure is dry, the company rebuilds drywall, flooring, paint, trim, fixtures and cabinetry, backed by 40+ years of combined remodeling experience on the team. The team speaks English, Spanish and Portuguese. To request an inspection, use the contact form.

Cost and insurance for water damage from an AC leak

An AC leaking water can create two separate costs: the HVAC repair to the unit, which the technician quotes after finding the cause, and the restoration of whatever the water reached. No sourced price is available for repairing the air conditioner itself. The figures below are national planning ranges for related restoration work, published by third-party cost sites. They are not DisasterPRO Restoration's prices, and a real number comes only from the written estimate after an on-site assessment.

The final cost depends on how far the water spread, which materials got wet and whether mold developed. More detail is in the guide on how much water damage restoration costs.

Insurance coverage for AC leak damage depends on your policy and on how the damage happened, so confirm it with your insurer. DisasterPRO Restoration bills insurance directly and helps with the claim. Read whether homeowners insurance covers water damage restoration before you file. Keep the photos you took before cleanup and the HVAC technician's notes on the cause.

Preventing AC leaks and the mistakes that turn a drip into a bigger repair

Preventing an AC from leaking water comes down to keeping the condensate path clear and the coil from freezing. Replace the air filter on the schedule your system's manufacturer recommends. Book regular maintenance with an HVAC technician so the drain line, pan, pump and coil get checked. If your home feels damp, ask about humidity control.

A small leak can become a larger repair because of what happens after the water is wiped up. The mistakes below can lead to hidden moisture and rework. How long proper drying takes depends on the materials, as explained in how long water damage restoration takes.

• Restarting the system before the cause is fixed, so the pan overflows again.
• Mopping the floor but never checking the ceiling below, the wall cavity or the subfloor.
• Reinstalling carpet, baseboards or trim before the materials underneath are confirmed dry.
• Pouring cleaners into the drain line without checking the manufacturer's guidance for your unit.
• Painting over a water stain instead of finding out why it is there.
• Treating a musty smell as proof of mold, or ignoring it completely, instead of having the area checked for moisture.
• Throwing away damaged belongings before photographing them for the insurance claim.

Dealing with water, mold or fire damage right now? Call DisasterPRO Restoration at (206) 880-1421 or request an estimate online.