An air conditioner leaking water onto your carpet can cause more than just a wet mess; it can lead to expensive damage fast. When an AC leaks water, it can damage your floors, ruin carpet padding, cause mould, and cost you a fortune in repairs. Especially in Mississauga homes where summers are humid, AC water leaks are a common and fixable issue.
This blog explains why your AC is leaking water inside, outlines the immediate steps you can take, and advises when to contact our Mississauga-based HVAC professionals for a fast and affordable repair.
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Why Your AC Leaks Water (Common Causes)
When an air conditioner leaks water inside the house, it’s usually one of these culprits:
1. Clogged Condensate Drain Line
Dust, dirt, or mould can block the drain line. Water backs up and spills out, often soaking your floors. If the clog is deeper in the pipe, it might require specialized HVAC equipment to clear it.
2. Cracked or Rusted Drain Pan
If your AC is older than 10 years, check the drain pan under the evaporator coil. Metal pans rust over time, and plastic ones may crack. This leads to slow leaks that can go unnoticed until the carpet is saturated.
3. Frozen Evaporator Coil
This is one of the most overlooked causes. Dirty filters, low refrigerant, or a malfunctioning blower can all lead to freezing. When the ice melts, the water drips right onto your floor.
4. Dirty Air Filter
Mississauga’s pollen-heavy spring and dusty summers clog filters quickly. If you haven’t changed your AC filter in the last month, there’s a good chance it’s causing restricted airflow and water buildup.
5. Low Refrigerant Levels
Besides freezing coils, low refrigerant can harm compressor performance. If you hear a hissing noise or the system isn’t cooling effectively, call a licensed technician right away.
6. Improper Installation or Unit Tilt
Sometimes it’s not the system, it’s the setup. A poorly installed indoor unit may tilt in a way that prevents proper drainage.
Learn when to replace your AC →
Step-by-Step: What to Do Immediately
If your AC leaks water onto your carpet, quick action can prevent costly damage. Follow these key steps to dry your home and protect your HVAC system.
1. Turn Off Your AC Unit
Power down the system from both the thermostat and the breaker panel. This stops water flow and helps frozen coils thaw. Running your AC while it’s leaking can worsen the issue and even damage electrical components inside the unit.
2. Soak Up the Water
Use thick towels, a mop, or a wet/dry vacuum to absorb as much water as possible. Don’t forget to check under furniture. If the water has seeped into the underpad, it’s best to bring in a professional water damage team before mould sets in.
3. Ventilate the Area
Boost airflow by opening windows and using portable fans. A dehumidifier will also help pull moisture from the air and carpets. This step is especially important in Mississauga’s humid summers to prevent lingering dampness and musty odours.
4. Check the Air Filter
A clogged or dirty air filter can restrict airflow, causing coils to freeze and later leak. Remove the filter and inspect it. If it’s coated in dust, replace it. Filters should typically be changed every 30 to 60 days for optimal AC performance.
How often should AC be serviced? →
5. Inspect the Drain Line
Peek into the condensate pan; if it’s full, the drain line may be blocked. Algae, dirt, or mould buildup can clog the pipe. If you’re confident, flush it out with white vinegar. Otherwise, let a technician handle it with proper cleaning tools.
6. Call a Licensed Mississauga HVAC Technician
Water leaks often signal deeper HVAC issues. Don’t gamble with your comfort or air quality. Contact HVAC Group for fast, same-day service. We’re trusted by homeowners across Mississauga for leak repairs and AC inspections.
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For expert carpet cleaning services, we recommend Carpet Cleaning Mississauga, who specialize in handling water-damaged carpets and keeping your home fresh.
Why You Should Act Fast
- Mould & Mildew: It takes only 24-48 hours for mould to start growing under damp carpet. Once it’s there, removal is expensive.
- Electrical Hazards: Leaking water near outlets, extension cords, or AC electrical components is risky.
- Bacteria & Allergens: Mississauga homes with kids or pets are more vulnerable to the health risks of wet carpet and contaminated air.
- Structural Damage: A prolonged leak can ruin subflooring and drywall, especially in basements and condos.
AC Repairs Done Right – Locally by HVAC Group
We serve homeowners across Mississauga, including Churchill Meadows, Streetsville, Erin Mills, Cooksville, and Port Credit. Our licensed technicians arrive fast, with fully stocked vans and transparent pricing.
Our Most Requested AC Services in Mississauga:
How to Prevent Future Leaks from Your AC
Prevention is always cheaper than repairs. Here’s what you can do:
- Replace filters regularly: A clean filter means better airflow and less condensation.
- Flush your drain line: Every 2-3 months, pour vinegar through the drain line to prevent clogs.
- Schedule yearly tune-ups: AC maintenance helps us catch issues before they leak.
- Use a float switch: This automatic shut-off feature stops your unit if the pan fills up.
Homeowners in Mississauga can benefit from our seasonal maintenance plans designed to protect their entire HVAC system.
Related HVAC Services
- Heat Pump Services →
- Water Heater Repairs →
- Thermostat Repairs →
- Furnace Repair in Mississauga →
- Humidifier Installation →
Final Word: Call HVAC Group if Your AC Leaks Water in Mississauga
If your AC leaks water onto your carpet, don’t wait. Call HVAC Group for fast, expert help in Mississauga. We’re trusted, transparent, and local. We’ll fix the leak, dry your space, and keep your home cool and safe.
