How to Clean Refrigerator Coils and Why It Matters for Performance

Where the coils are and why they get dirty

Refrigerator coils are the tubes that run behind or underneath your fridge and release the heat your appliance pulls from inside. Over time, dust, pet hair, and debris stick to these coils and create an insulating layer that makes your compressor work harder to cool your food. When coils are clogged, your fridge runs longer, uses more electricity, and can fail earlier than it should.

Most refrigerators have coils in one of two places: behind the lower front grille (the kickplate you can remove), or coiled around the compressor underneath the fridge. Check your manual to find yours. Some newer models have coils mounted higher up or inside the cabinet, which rarely need cleaning because they're sealed away from dust.

Key Takeaways

• Unplug your refrigerator before you start cleaning coils—this protects you from electrical shock and prevents the compressor from running while you work.
• Remove the front grille or access panel by hand or with a screwdriver, then vacuum the coils with a brush attachment to pull out dust and hair.
• For stubborn buildup, use a coil cleaning brush (a long, thin brush designed for this job) or a soft-bristled bottle brush to gently loosen debris before vacuuming again.
• Clean your coils every six months if you have pets or live in a dusty area, or once a year if your home is relatively clean.

Unplug and locate your coils

Start by unplugging your refrigerator from the wall outlet. This is the most important safety step—it prevents electrical shock and stops the compressor from cycling on while you're working near it. Wait a few minutes for any residual charge to dissipate before you touch anything metal inside the fridge cavity.

Open the kickplate at the bottom front of your fridge by either pulling it straight toward you or unscrewing the two or three fasteners holding it in place. If your coils are underneath rather than behind the grille, you may need to pull the entire fridge away from the wall and remove a panel on the back or bottom. Consult your manual if you're unsure—forcing the wrong panel can damage your appliance.

Vacuum the coils with a brush attachment

Once you can see the coils, attach a soft brush head to your vacuum hose. The brush helps loosen dust without puncturing the delicate aluminum tubes. Run the vacuum slowly over the entire coil surface, moving in the direction the coils run. Pay extra attention to areas where dust has visibly accumulated—usually the bottom and sides of the coil bundle.

If your vacuum doesn't have a brush attachment, you can hold the hose close to the coils and let the suction do the work, but a brush is gentler and more effective. Avoid using a stiff brush or compressed air directly on the coils, as both can bend the fins and reduce cooling efficiency.

Use a coil brush for stubborn buildup

If vacuuming alone doesn't remove all the debris—especially if you haven't cleaned the coils in years—use a coil cleaning brush. These are long, thin brushes with bristles designed to fit between the coil fins without damaging them. You can buy one at any appliance parts store or online for under $15. A soft-bristled bottle brush works in a pinch if you don't have a coil brush.

Gently brush between the fins in a back-and-forth motion, working from top to bottom. Loosen the debris without pressing hard—the fins are thin and bend easily. After brushing, vacuum again to capture the loosened dust. Repeat this cycle until the coils look visibly cleaner and no more dust comes out when you vacuum.

Clean the grille and surrounding area

While the grille is off, wipe it down with a damp cloth or vacuum it to remove dust and pet hair. The grille itself can trap a surprising amount of debris and reduce airflow if left dirty. Dry it completely before reinstalling.

Check the floor or surface directly under the coils for accumulated dust and hair. Vacuum this area thoroughly—it's often where the most debris collects. If your coils are underneath the fridge, also wipe down the underside of the fridge body and the top of the compressor if you can reach it safely.

Reassemble and plug back in

Slide the grille or access panel back into place and secure it with screws if needed. Make sure it sits flush and isn't blocking any vents. Plug your refrigerator back into the outlet and listen for the compressor to start up within a few minutes. The fridge should run more quietly and cool more efficiently now that the coils can release heat properly.

Set a reminder on your phone or calendar to clean the coils again in six months (or sooner if you have pets or live in a dusty area). Regular cleaning prevents the heavy buildup that makes the job harder and keeps your fridge running at peak efficiency.

When to call a technician

If your fridge still doesn't cool properly after cleaning the coils, or if you notice refrigerant leaking (a hissing sound or oily residue on the coils), stop using the appliance and contact a repair technician. Refrigerant leaks are hazardous and require professional service. Similarly, if you accidentally bend the coil fins badly during cleaning, a technician may need to straighten them or replace the coil assembly.

If you're uncomfortable removing panels or accessing the coils yourself, a service call for coil cleaning typically costs $100 to $200 and takes less than an hour. It's worth the cost if it extends your fridge's life by a year or two.

Frequently Asked Questions

How often should I clean my refrigerator coils?

Once a year is standard for most homes. If you have pets, live in a dusty area, or notice your fridge running constantly, clean them every six months. Check the coils visually—if you see a thick layer of dust, it's time to clean.

Can I use compressed air to clean the coils?

Compressed air can bend the thin aluminum fins and reduce cooling efficiency. A vacuum with a brush attachment is safer and more effective. If you must use compressed air, keep it at low pressure and hold it at an angle rather than blowing directly into the fins.

What if I can't find the coils on my refrigerator?

Check your manual—some newer models have sealed coil systems that don't require cleaning. If your manual doesn't show coil location, contact the manufacturer's customer service line with your model number, and they can tell you whether your fridge has accessible coils.

Will cleaning the coils reduce my electric bill?

Yes, but the savings depend on how dirty the coils were. A heavily clogged coil system can make your fridge run 10 to 15 percent longer than necessary. Cleaning restores efficiency, though the difference is most noticeable if you haven't cleaned them in years.

Can dirty coils cause my fridge to stop cooling?

Dirty coils make cooling slower and less effective, but they rarely cause complete failure. Your fridge will keep running and trying to cool, which is why it runs constantly and uses more energy. Over time, the extra strain can damage the compressor, so cleaning prevents that damage.