If your system isn’t cooling like it used to, dirty coils could be to blame. Learning how to clean HVAC coils helps your air conditioner or heat pump work efficiently and avoid expensive repairs.

Today, we’ll show you safe, effective ways to clean evaporator and condenser coils yourself—and when it’s time to call in the pros.

Need professional coil cleaning? Schedule a service with Qualitech today

How to Clean HVAC Coils

Regular cleaning keeps your system performing its best. Here’s how to tackle it step by step:

Step 1: Turn Off All Power

Before starting, switch off your thermostat and shut off power at the breaker panel to avoid any electrical hazards.

Step 2: Locate the Coils

• Evaporator coils are inside the indoor unit (often near the air handler or furnace).

• Condenser coils are in the outdoor unit.

Step 3: Remove Debris

Clear away leaves, grass, and debris from the outdoor condenser coils using a soft brush or gloved hands.

Step 4: Use Coil Cleaner

Spray a no-rinse coil cleaner (available at any hardware store) evenly across the coils. Let it foam and loosen dirt for about 10–15 minutes.

Step 5: Rinse Carefully

For outdoor condenser coils, gently rinse with a garden hose (low pressure) to wash away loosened debris. Avoid using high pressure—it can bend delicate fins.

Tip: Indoor evaporator coils often don’t need rinsing if you use a no-rinse cleaner. Always check the instructions on your product.

Step 6: Reassemble and Restore Power

Reattach any panels or covers. Wait until all components are dry, then restore power and test your system.

Why Coil Cleaning Is Important

Dirty coils:

• Reduce cooling efficiency

• Increase your utility bills

• Cause system strain and shorten lifespan

• Lead to ice buildup on evaporator coils

Keeping them clean helps your HVAC system last longer and run smoother.

Final Tip

Don’t let dirty coils compromise your comfort. Clean them regularly—or let our team handle it so you can relax.

📍 Serving Philadelphia & Huntingdon Valley
✅ Book your HVAC coil cleaning with Qualitech Heating & Cooling

FAQs

Q: How often should I clean HVAC coils?
At least once a year—ideally before the cooling season begins.

Q: Can I clean coils without removing panels?
Some outdoor coils can be cleaned without removing covers, but it’s more thorough if you open them carefully.

Q: What if the coils are heavily clogged?
If dirt won’t come off or you’re unsure, it’s safer to call a professional.