Dirty Refrigerator Coils (Troubleshooting & Fixes)

    Fridge not cooling right and your power bill is climbing? Your dirty condenser coils are likely the problem. Here's how to fix it from a 25-year tech.

    DIY Fix: $5–$20
    Pro Help: $150–$500
    Time: 15–120 min

    Quick Answer

    Okay, so here's the quick version. Your fridge feels warm and your electric bill is making you sweat? Nine times out of ten, it's because the condenser coils are caked in dust and pet hair. It's like making the poor thing run a marathon with a plastic bag over its head. It can't breathe, so it can't get rid of heat. Cleaning them is dead simple, costs you almost nothing but 30 minutes of your time, and can save you from a thousand-dollar repair bill down the road. Seriously, this is the first thing you should check.

    Dirty Refrigerator Coils (Troubleshooting & Fixes) visual diagram
    Visual guide for diagnosing key fob issues

    Common Symptoms

    Refrigerator is humming louder or running constantly.
    The inside of the fridge doesn't feel cold enough, even with the thermostat down.
    Your electricity bill has mysteriously gone up.
    The sides of the refrigerator feel unusually warm to the touch.

    Possible Causes

    A thick blanket of dust, pet hair, and grime builds up on the coils, acting like an insulator and trapping heat.
    Restricted airflow around the coils because the fridge is pushed too tight against a wall or enclosed in cabinets without ventilation.
    The compressor is forced to run continuously to try and remove heat from the system, leading to overheating and excessive wear.

    Step-by-Step Diagnosis

    1

    Step 1

    First, just listen and feel. Is the fridge running non-stop? Does the side of the unit feel warm? That's your first clue.

    2

    Step 2

    Unplug the refrigerator from the walloutlet. I can't stress this enough - safety first.

    3

    Step 3

    Locate the coils. Check the back of the fridge first. If not there, pop off the kick plate at the bottom front and look underneath with a flashlight.

    4

    Step 4

    Visually inspect them. If you see a carpet of gray dust and hair instead of black metal fins, you've found the issue. It'll be obvious.

    Dirty Refrigerator Coils (Troubleshooting & Fixes)
    Key fob troubleshooting and repair overview

    DIY vs Professional Costs

    Condenser Coil Cleaning
    DIY$0 - $25
    Pro$125 - $200
    Time30-45 minutes

    When to Call a Professional Appliance

    • You completely cleaned the coils and waited a few hours, but the fridge is still not cooling down. The problem is something else.
    • You discover the coils are bent, damaged, corroded, or see an oily substance on them. That's a sign of a refrigerant leak and is not a DIY fix.
    • Your refrigerator is a built-in model and you can't easily access the coils without major disassembly. Let a pro handle that headache.
    • You're just not comfortable pulling out a heavy appliance and working on it. It's better to pay for a simple service than to cause a bigger problem.

    Prevention Tips

    • Clean the condenser coils every 6 to 12 months. Set a recurring calendar alert. If you have pets, do it every 3-4 months.
    • Make sure there's at least an inch of clearance behind and on the sides of the refrigerator to allow for proper airflow. Don't suffocate your appliance.
    • Periodically use your vacuum cleaner's hose attachment to clean the floor and area around the front and back of the refrigerator to reduce debris buildup.
    Dirty Refrigerator Coils (Troubleshooting & Fixes) professional repair detail
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    Frequently Asked Questions

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