how to clean refrigerator coils

Learning how to clean refrigerator coils is the cheapest fridge repair you will ever do. It takes about 20 minutes. It needs no special skills. And it fixes more cooling complaints than almost anything else. Dirty coils force your fridge to work overtime. That means higher power bills, warm spots, and a compressor that wears out years early.

This guide shows you exactly where the coils are, how to reach them safely, and what to use. You will also learn how often to clean them and the warning signs that they need it now.

The short answer on how to clean refrigerator coils

Unplug the fridge. Find the coils behind or under the unit. Vacuum the loose dust. Scrub between the coil rows with a long coil brush. Vacuum again. Plug the fridge back in. Clean them every 6 to 12 months, more often with shedding pets. That is the whole job.

What the coils do and why dirt hurts

Your fridge does not create cold. It moves heat out of the box. The condenser coils are where that heat escapes into your kitchen. Refrigerant inside the coils is hot and pressurized. Room air flowing over the coils cools it down. Clean coils give up heat fast.

Dust changes the math. A layer of dust and pet hair acts like a blanket. Heat gets trapped. The refrigerant stays hot. The compressor runs longer to compensate. It may run almost nonstop and still fail to cool properly. That is why fridge cooling problems often trace back to dirty coils. Many owners never clean them.

Signs your coils need cleaning right now

Watch for these clues:

• The fridge runs constantly or cycles far more than it used to.
• The outside walls or the strip between the doors feel very hot.
• Food in the fridge section is not as cold as it should be.
• Your power bill has crept up for no clear reason.
• The compressor area hums louder than you remember.
• You can see dust bunnies hanging behind or under the fridge.

Any two of these together mean the coils are almost certainly dirty. Even one is a good reason to look. For more, see our guide on why a fridge runs constantly.

Where to find the coils

Coils live in one of two places. Older fridges and most side by side models have them on the back. You will see black tube rows running across the lower back of the unit. Newer fridges often hide them underneath. Look for a snap off kick plate or grille at the bottom front. Behind it you will find the coil rows running left to right.

Some high end models have coils sealed inside the cabinet walls. These are called skin condenser fridges. They have no coils to clean. The heat escapes through the cabinet sides, which is why those sides feel warm. If you find no coils on the back and no rows under the grille, your model may be this type. Check your manual to be sure.

What you need before you start

Gather these items:

• A vacuum cleaner with a brush or crevice attachment.
• A long refrigerator coil brush from a hardware store.
• A flashlight.
• A damp cloth for the grille and floor.

Skip sharp scrapers, knives, and wire brushes. The sealed system lines run right beside the coils. A puncture releases refrigerant and turns a free cleaning into an expensive compressor level repair.

Cleaning the coils step by step

1. Unplug the fridge

Pull the plug from the wall outlet. Do not just turn the thermostat dial down. The compressor and the condenser fan can still kick on. Food stays safe for up to 4 hours with the doors shut. You will be done in 20 minutes.

2. Pull the fridge away from the wall

For back coil models, pull the unit forward slowly. Watch the water line if you have an ice maker. Give yourself enough room to stand behind it comfortably. For bottom coil models, you only need to pop off the front kick plate. Most grilles pull straight off or release with two clips.

3. Vacuum the loose dust

Run the vacuum brush attachment over the coils. Work top to bottom. Get the big dust bunnies, cobwebs, and pet hair first. Vacuum the floor and wall behind the fridge too. Dust on the floor just drifts back onto the coils.

4. Brush between the coil rows

Push the coil brush deep between the rows. Move it back and forth gently. The brush is made to fit these gaps. Work across the full width of the coil bank. You will be surprised how much dust falls out even after vacuuming.

5. Vacuum again and wipe down

Vacuum everything the brush knocked loose. Wipe the kick plate or grille with the damp cloth. Mop or vacuum the floor where the fridge sits. Slide the fridge back, leaving 1 to 2 inches of space behind it for airflow.

6. Plug it back in and check

Restore power. Listen for the compressor to start within a few minutes. Over the next few hours, check that the fridge section holds 37 to 40 degrees and the freezer hits 0. Better cooling and shorter run times should show up within a day.

How often to clean them

Every 6 to 12 months covers most homes. Clean every 6 months if any of these apply:

• Dogs or cats that shed.
• The fridge sits in a garage or dusty utility room.
• The kitchen is near a construction zone or a busy road.
• You cook with a lot of grease that goes airborne.

Mark it on your calendar twice a year. Pair it with another twice yearly job, like changing smoke detector batteries. People who clean on a schedule rarely face surprise cooling failures.

Pet hair: the coil killer

Pet hair is worse than plain dust. It mats together and weaves between coil rows. A vacuum alone often cannot pull it out. That is where the coil brush earns its keep. Work the brush through first, then vacuum the loosened hair. If you have heavy shedders, check the coils every 3 months. The back of the fridge is a magnet for fur.

What cleaning will not fix

Coil cleaning is powerful, but it is not magic. If cooling does not improve after a good cleaning, the problem is elsewhere. Common next suspects include a failed evaporator fan, a stuck damper, a bad door seal, or low refrigerant. Strange sounds point to specific parts, so run your noise through our fridge noise guide. Water on the floor is a different problem, covered in our fridge leaking guide. See our refrigerator repair page for what we check on every visit.

Tried cleaning and the fridge still struggles?

Then something deeper is wrong and guessing gets expensive. Our techs diagnose cooling failures daily. We check coils, seals, fans, and the sealed system in one visit. Call +1 (888) 206-0056 to book. Home Appliance Repairs offers same day and next day refrigerator repair. We serve 40 cities across the US. Find yours on our locations page.