Refrigerator Not Cooling? Top Causes and Repair Tips

When your refrigerator suddenly stops cooling, it can feel like an emergency. Food starts spoiling, the fridge interior feels warm, and settings seem ineffective no matter how much you adjust them. For many homeowners, the first assumption is that the entire appliance has failed and will need a costly replacement. However, that’s not always the case—and jumping to conclusions can lead to unnecessary expenses. At UpFix, we specialize in diagnosing and repairing electronic components that are often the root cause of these problems. Specifically, issues with refrigerator control boards are more common than you think. Our goal in this guide is to help you understand the signs, walk you through effective troubleshooting, and provide you with actionable solutions. Whether you're dealing with a Whirlpool, Samsung, LG, or another brand, identifying the true fault can save you hundreds. If your refrigerator shows any of the following symptoms, we invite you to explore our expert solutions—and reach out to UpFix for affordable, reliable repairs.

Common Symptoms When a Refrigerator Isn’t Cooling Properly

Refrigerators may still appear functional even when cooling fails. If you're not monitoring internal temperatures regularly, these issues can go unnoticed until food begins to spoil or temperature inconsistencies become obvious. Identifying early symptoms helps prevent larger issues and supports smarter diagnostics. Understanding these signs is the first step toward identifying if a refrigerator control board or related component may be the issue.

What You May Notice?

The refrigerator may feel warm even though the interior lights turn on and the fan is operating. You may hear normal sounds like humming or fan movement, yet the cooling performance is weak or absent. Sometimes, the freezer compartment still works properly, but the fridge area stays warm. This can be particularly confusing and lead users to incorrectly assume that the compressor has failed. Another noticeable sign is rapid spoilage of perishable items, even when the temperature dial is set to maximum. These situations often leave users frustrated and unsure of what part to check first.

Why This Matters?

These symptoms often indicate more than just cooling failure; they can point to sensor issues, blocked airflow, or faulty electronic communication between parts. For example, the thermistor may be sending incorrect temperature data to the refrigerator control board, preventing it from engaging the compressor. In many cases, it is not the mechanical system that fails, but the control mechanisms responsible for proper regulation. Knowing what to look for can help you avoid unnecessary technician visits or full replacements. This also empowers you to communicate more clearly when you seek professional help, ensuring quicker and more accurate resolutions.

How to Troubleshoot a Refrigerator That’s Not Cooling?

Homeowners can often perform simple diagnostic checks before calling for repair. If your fridge isn't cooling properly, taking these steps can help rule out common user-level issues. These checks also help determine whether the problem may stem from power supply, airflow blockage, or internal component failure. Our checklist provides a practical path to follow.

Step-by-Step Checklist for Homeowners

Before assuming the worst, it helps to go through a structured checklist to rule out simple issues. This guide is designed to help you identify whether the problem lies with user-level settings, airflow components, or electrical parts. These steps are suitable for homeowners who want to take a proactive approach before calling a technician. Every point below has been included based on the most common issues we encounter during service calls. Use this checklist to save time, avoid unnecessary repairs, and understand your fridge better.

• Check the Temperature Settings: Make sure the refrigerator is set between 35°F and 38°F, and the freezer is at 0°F. Incorrect settings are a frequent cause of cooling issues, often reset after power outages.
• Verify Power Supply: Plug another appliance into the same outlet to test function. Inspect the power cord and plug for any damage. A faulty or loose connection may interrupt cooling.
• Inspect Condenser Coils: Dirty coils prevent heat release. Clean them with a coil brush every 6 to 12 months to improve efficiency.
• Listen for the Evaporator Fan: Open the freezer and listen. If silent, the motor could be faulty. Use a multimeter to check continuity and replace if necessary.
• Test the Start Relay: Unplug the fridge and remove the relay from the compressor. Test continuity using a multimeter. A failed relay can prevent compressor startup.
• Check the Thermistor: This sensor sends temperature readings to the refrigerator control board. If it’s not working, the board may not cool properly. Test resistance using a multimeter.
• Test the Compressor Windings: Perform this only after checking other components. Use a multimeter to test winding continuity and ground faults. This step may require a professional technician.

When the Real Issue Is in the Electronics—Not the Cooling System?

When you’ve ruled out common physical issues but still have a warm fridge, the root cause may lie in the electronic system. Many refrigerator failures today trace back to faulty circuit boards, failed relays, or sensor miscommunications. At UpFix, we see countless cases where customers nearly gave up on their units—only to find the problem was easily fixable at the component level.

Failing Thermistor or Control Board

A malfunctioning thermistor can disrupt accurate temperature readings. When this happens, the control board may think the unit is cool enough and therefore won’t activate the compressor. Likewise, if the refrigerator control board itself is faulty, it might not send the correct signal at all. In these cases, cooling stops even when all mechanical parts are functioning. Repairing or replacing the thermistor and restoring control board functionality can fully resolve the issue.

Bypass Relay Faults

Startup issues are often linked to the relay or capacitor. When the relay fails, it can’t deliver the initial power surge the compressor needs. This creates a scenario where the compressor appears dead, but the real problem is easily repairable. Replacing a relay is significantly cheaper than buying a new compressor or appliance, and at UpFix, we often find this to be the root cause during diagnostics.

Airflow Blockage Due to Fan Failure

A failed evaporator fan means that cold air produced in the freezer doesn't circulate to the fridge. While the freezer stays cold, the refrigerator warms up. This is often misdiagnosed as a sealed system failure, when in fact it’s a simple fan replacement. Proper airflow is critical, and our technicians routinely restore full operation with this type of targeted fix.

Why Choose UpFix for Appliance Electronic Repairs?

At UpFix, we bring electronics expertise directly into the world of appliance repair. We specialize in restoring the components others replace, with a focus on appliances refrigerator control boards and logic systems. Our IPC-certified technicians follow strict quality controls to deliver results that last.

We Specialize in What Others Replace

We don’t just guess or swap parts. Our repair process includes thorough bench testing, diagnostic scanning, and thermal stress simulations. From temperature sensors and thermistors to the actual logic chip in your refrigerator control board, we isolate the root problem and repair it at the component level. This approach reduces waste, saves customers money, and avoids unnecessary replacements. Our team regularly restores boards that would otherwise be discarded.

Fast Turnaround, Certified Work

Most control boards sent to UpFix are repaired and shipped back within one business day. Our IPC-certified technicians ensure repairs meet industry standards for durability and safety. Every component undergoes bench testing under load, which simulates actual working conditions. This minimizes the chance of repeat failures and ensures confidence in every repair we return.

Up to 80% Cost Savings Over Full Unit Replacement

Replacing a refrigerator can cost between $800 and $3,000. At UpFix, we offer repairs for a fraction of that cost by focusing on the real issue—often the refrigerator control boards. On average, UpFix saved customers over $314 Million by repairing control boards and relays instead of replacing entire appliances. Most jobs are completed for under 20% of replacement cost, without the hassle of heavy deliveries or complicated installations. If your refrigerator isn’t cooling, don’t assume it’s a total failure—reach out to UpFix today for expert diagnosis and repair solutions that target the real source of the problem.

Case Study – Control Board Repair Restored Cooling in a Samsung Refrigerator

We frequently handle cases where units that seemed beyond repair were restored to full function at minimal cost. One such success story involved a Samsung refrigerator that arrived at our shop with both fan failure and unresponsive controls. Here’s what we found and how we solved it.

Problem Reported

The customer reported that the refrigerator compartment was warm while the freezer was still cold. All indicator lights and internal lights functioned, but food was spoiling rapidly. Another technician had recommended full compressor replacement. However, the compressor was running intermittently, and the fan was completely silent.

Diagnostic Findings

Our diagnostics revealed a failed relay and a damaged logic IC on the main control board. Voltage irregularities suggested miscommunication between the thermistor and the board. The evaporator fan motor was functional, but it was not receiving the signal to engage. This pointed directly to control board failure, not compressor issues.

UpFix Solution

We replaced the defective relay, reprogrammed the logic IC, and tested the unit using a thermal stress simulation. We verified the airflow controls were now operating and confirmed proper activation of the evaporator fan. All components passed bench testing and were shipped back the same day. The customer reinstalled the board using our instructions.

Result

Full cooling was restored across both compartments. The customer avoided replacing the entire appliance and saved more than $1,200. This real-world case shows that issues often attributed to expensive parts can be solved by repairing a $150 control board. With our expertise, the Samsung unit performed as good as new without compressor replacement.

Testimonials From Appliance Owners Who Chose Repair Over Replacement

Our customers are often surprised by how effective a control board repair can be. From preventing unnecessary replacements to restoring full appliance performance, their feedback says it all. Below are a few real testimonials that highlight the impact of choosing UpFix for refrigerator control board repairs.

9/2/2025

Everything was good on service

 

-Mauricio

8/25/2025

Easy and fast service.

 

-Luis

8/25/2025

Easy and fast service.

 

-Luis

Frequently Asked Questions (FAQs)

When homeowners experience cooling problems, they often have similar concerns and uncertainties. This section addresses the most frequent questions our team receives, based on years of hands-on repair experience. These answers are meant to clarify misconceptions, guide safe DIY actions, and help you know when to involve a professional. If you're unsure whether the issue is electrical or mechanical, these FAQs offer direction. We encourage customers to explore these insights before investing in costly replacements.

What if my freezer is cold but the fridge isn’t?

This is one of the most common signs of evaporator fan or airflow blockage issues. It could also be a sensor miscommunication causing the refrigerator control board to shut off airflow to the fridge. These problems are frequently misdiagnosed as sealed system failures, but they're almost always repairable.

Do I need a technician to clean coils or test parts?

Cleaning condenser coils is a safe DIY task and should be done regularly. However, electrical testing of relays, thermistors, or internal components should be done carefully and only if you have the proper tools. For in-depth diagnostics, we recommend working with certified technicians like those at UpFix.

Can UpFix repair refrigerator boards from all brands?

Yes. Our team is experienced with brands including Samsung, LG, Whirlpool, Frigidaire, GE, Maytag, and more. Each board is bench-tested to ensure it meets operational specifications before being returned. If you're unsure, our support team can verify compatibility before you ship your part.

Smart Troubleshooting Leads to Smart Repairs

Cooling failure in a refrigerator doesn’t automatically mean your appliance is dead. Far too many units are replaced when the real issue is an easily fixable board or sensor error. Knowing what to look for, and taking smart diagnostic steps, can mean the difference between a $1,200 replacement and a $150 repair.

At UpFix, we give our customers more than just repairs—we give them clarity and savings. By diagnosing issues down to the component level, we make sure you’re only fixing what’s actually broken. So before you buy new, consider repair. You’ll save money, reduce waste, and extend the life of your appliance.

Don’t Replace Your Fridge Yet—Choose the Smarter Option

If your refrigerator is no longer cooling, it may not be a mechanical failure. Start with a focused inspection and ask yourself: has the control board been checked? At UpFix, we specialize in diagnosing and repairing refrigerator control boards that often cause these issues. Ship your board to UpFix and our technicians will pinpoint and fix the exact fault quickly. We provide fast, dependable mail-in repair services that restore performance without the high cost of replacement. Stop wasting time and money—contact UpFix today to schedule your repair or request a free quote. Need expert advice? Join our support forum for real troubleshooting solutions. Whether it’s a Whirlpool, Samsung, or LG, we’re ready to help you get your fridge back to optimal condition. Choose repair solutions with UpFix—smart, affordable, and proven effective.