How to Clean AC Coils - step by step process guide
Photo by Kelly Sikkema on Unsplash

How to Clean AC Coils

6 steps 30 min Intermediate

Dirty AC coils reduce efficiency by 30% and increase energy costs. Clean coils yearly for optimal cooling performance.

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Step-by-Step Instructions

1

Step 1: Turn Off Power

Turn off AC at thermostat. Flip breaker for outdoor unit. Verify power is off with voltage tester.

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2

Step 2: Access Coils

Remove outdoor unit cover (usually screws or clips). Remove debris around unit. For indoor coil: access through blower compartment.

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3

Step 3: Remove Loose Debris

Use soft brush or vacuum with brush attachment to remove leaves, dirt, cottonwood. Work gently - coil fins bend easily.

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Coil Fin Comb

Straightens bent fins, restores airflow

$8 View Details
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4

Step 4: Apply Coil Cleaner

Spray no-rinse coil cleaner on coils (outdoor: outside-in, indoor: inside-out). Let foam sit 10-15 minutes to break down grime.

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No-Rinse Coil Cleaner

Self-rinsing formula, safe for fins

$15 View Details
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5

Step 5: Rinse and Reassemble

Gently rinse outdoor coil with garden hose (low pressure, inside-out). Indoor coil: wipe with damp cloth. Straighten bent fins. Replace covers.

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6

Step 6: Test System

Turn power back on. Run AC. Check for proper cooling. Monitor for 30 minutes. Should blow 15-20°F colder than room temp.

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