Appliance EMT’s Emergency Diagnostic Guide: How to identify the cause of the clicking noise and save your frozen food fast.
You walk into the kitchen, grab a glass of water, and hear a distinct sound coming from the back of your refrigerator:
Click… hum… silence… click.
It’s definitively your Freezer Making a Clicking sound. You open the freezer door, only to find soft ice cream, melting ice cubes, and a noticeable lack of cold air.
“When a homeowner calls us hearing a rhythmic clicking sound, time is of the essence,” says Sergey, Appliance EMT Master Technician.
“That sound is your freezer literally crying for help. It means your compressor, the heart of the cooling system, is trying to start, but something in the electrical circuit is stopping it. If you catch it early, it’s often an inexpensive fix. If you ignore it, you risk burning out the compressor entirely.”
If your Freezer is making a clicking sound and failing to hold temperature, here is what’s happening behind the scenes, how to troubleshoot it, and what you should do right now to save your groceries.
Quick Answer & Key Takeaways
- The Problem: A repeating click… hum… silence means your compressor is trying to turn on, but an electrical component is failing or overheating.
- The Most Common Cause: In ~80% of cases, it’s a burnt-out start relay—a quick, inexpensive fix if caught early.
- Immediate Action: Unplug the freezer now to prevent the compressor motor from overheating and permanently burning out.
- The Fix: Requires testing electrical components with a multimeter to avoid replacing the wrong part or shorting the main board.
Table of Contents
What Does the “Clicking” Sound Actually Mean?
To understand the problem, you need a quick look at how your freezer powers up. When the temperature inside rises, the thermostat sends an electrical signal to start the compressor. Because starting a heavy electric motor requires a sudden burst of electricity, the system uses a start relay to give the compressor a boost.
When you hear a click every 2 to 5 minutes:
- The relay attempts to kickstart the compressor.
- The compressor fails to start (or turns off immediately).
- The thermal overload switch detects excessive heat or current and clicks off to prevent a fire or motor damage.
- The system cools down for a few minutes, and the cycle repeats.
If your unit isn’t making a clicking sound but is still losing temperature, you may be dealing with an evaporator fan failure or a defrost drain clog. Check out our comprehensive freezer troubleshooting guide to narrow down other non-cooling symptoms.”
4 Common Reasons Your Freezer Is Clicking
According to Master Technician Sergey, four main culprits cause this issue:
1. A Failed Start Relay (The #1 Culprit)
“In about 80% of the clicking freezer calls I diagnose in the field, the culprit is simply a blown start relay,” notes Sergey.
The start relay (or PTC relay) is a small plastic module attached directly to the side of the compressor. Over time, internal ceramic discs inside the relay heat up, degrade, and shatter due to power surges or age. When the relay fails, it can no longer send power to the compressor winding, resulting in a click and no cooling.
2. Overheated Compressor Caused by Dirty Coils
If your condenser coils (located under or behind the unit) are caked in dust, lint, or pet hair, heat cannot escape the cabinet. The compressor is forced to run hotter and longer. Eventually, the compressor overheats, triggering the overload protector to trip continuously – producing that rhythmic clicking.
3. A Faulty Run Capacitor
The run capacitor works alongside the relay to deliver steady electrical current while the motor operates. If the capacitor bulges, leaks, or fails internally, the compressor won’t receive the required power to turn over, resulting in a click and a shutdown.
4. A Seized or Burned-Out Compressor
This is the worst-case scenario. If the internal mechanical pistons of the compressor lock up—or if the internal electrical windings short out—the motor simply will not turn, no matter how much power the relay sends. The thermal protector will click off every single time.
Sergey’s 3-Step Emergency Triage Checklist for Freezers
Before you call in a technician, Sergey recommends taking these three immediate steps to protect your appliance and your food:
- Unplug the Appliance: “If your compressor continuously tries to start and trips the relay every few minutes, the extreme heat can destroy the motor windings,” explains Sergey. “Unplugging the unit stops further damage.”
- Consolidate Your Food: Transfer delicate frozen items (meats, dairy, seafood) to a cooler filled with ice bags to buy time.
- Clean the Condenser Coils: Pull the freezer away from the wall and use a vacuum brush attachment to remove heavy dust buildup around the bottom and back coils.
Why This Isn’t Always a DIY Job
While replacing a start relay seems straightforward in online DIY videos, Sergey warns homeowners against blind part-swapping:
“Modern freezers use specific digital controls, inverter boards, and precise electrical tolerances,” Sergey cautions. “Installing the wrong aftermarket relay can feed improper amperage to your compressor motor, turning a $100 to $300 repair into a $1,000 compressor replacement. Plus, testing these components safely requires working with live electrical currents.”
Diagnosing a clicking freezer isn’t a guessing game. A certified Master Technician uses precision diagnostic tools to test:
- Microfarad ratings on the capacitor.
- Resistance (Ohms) across the compressor terminals to verify motor health.
- Control board voltage output to ensure electricity is reaching the cooling system properly.
When electrical testing requires live multimeter diagnostics, turning to professional freezer repair services ensures your appliance is diagnosed safely and repaired using factory-certified OEM parts rather than generic aftermarket guesswork.
How Appliance EMT Restores Your Peace of Mind When Your Freezer is Making a Clicking Sound and Not Cooling
At Appliance EMT, we treat a non-cooling freezer like a true emergency. We know every hour counts when your food is on the line.
When you book an appointment with our team:
- Fast Diagnostic Response: Our master technicians arrive equipped with advanced testing tools to pinpoint whether it’s a $50 relay or a major component.
- Fully Stocked Vans: We carry common start relays, capacitors, overload protectors, and fans right on our trucks so we can complete most repairs in a single visit.
- Upfront, Honest Pricing: No hidden fees. We provide a clear quote before any work begins, and our diagnostic fee is applied directly toward your repair.
- Backed by our Guarantee: Every repair comes with our comprehensive 90-day parts and labor guarantee.
🚑 Is Your Freezer Clicking Right Now? Don’t Wait Until Your Food Thaws!
Let the experts at Appliance EMT diagnose and fix the problem fast.
📞 Call Appliance EMT Today at 1-877-649-9777
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Frequently Asked Questions About Clicking Freezers
How long will food stay frozen if my freezer stops cooling?
An unopened freezer will typically keep food safe and frozen for 24 to 48 hours. Keep the door strictly closed to retain cold air while waiting for a repair technician.
Is it dangerous to leave a clicking freezer plugged in?
While it rarely causes a fire due to internal thermal safety switches, leaving it plugged in forces the compressor to overheat repeatedly. This can permanently ruin a $1,000+ compressor instead of requiring a simple $100–$300 relay repair. Unplug it immediately.
How much does it typically cost to fix a clicking freezer?
If the issue is a simple start relay or capacitor, repairs generally range from $150 to $300 including parts and labor. If the compressor itself has locked up or shorted out, replacement costs are significantly higher, and replacing the unit may be recommended.
About Sergey
Sergey is one of our best and most experienced Master Repair Technician at Appliance EMT. In fact, he won the 2024 Technician of the Year award and is often featured in various home improvement articles for his professional expertise.
With over 15 years of experience in the residential and commercial appliance repair industry, he makes repairing diagnosing and repairing complex issues on washer, refrigerators, dryers look easy with calm demeanor and steady hands.
You can find Sergey repairing appliance in Metro Atlanta communities like Buford, Atlanta, Roswell, Alpharetta and Decatur.