Refrigerator Not Cooling? Troubleshooting Guide and Common Causes

A refrigerator that is not cooling is one of the most urgent appliance problems you can face. Food spoils quickly at unsafe temperatures, and a warm refrigerator can cost hundreds of dollars in wasted groceries. The good news is that most cooling problems can be diagnosed in a single visit, and many causes are inexpensive to repair.

Table of Contents

• Common Causes of a Refrigerator Not Cooling
• 1. Dirty Condenser Coils
• 2. Evaporator Fan Motor Failure
• 3. Condenser Fan Motor Failure
• 4. Faulty Start Relay or Capacitor on Compressor
• 5. Frosted Evaporator Coil or Defrost System Failure
• 6. Bad Temperature Control Thermostat
• 7. Failed Compressor
• 8. Airflow Blockage or Overloaded Shelves
• Brand-Specific Refrigerator Not Cooling Issues
• How to Troubleshoot a Refrigerator Not Cooling: Step by Step
• When to Call a Professional for Refrigerator Repair
• Refrigerator Repair Costs in San Diego
• Preventing Future Refrigerator Cooling Problems
• Frequently Asked Questions

911 Appliance Repair has been fixing refrigerators in San Diego since 1991. This guide walks through the most common reasons a refrigerator stops cooling, how to troubleshoot each one, and when to call a professional.

TL;DR: The most common causes of a refrigerator not cooling are dirty condenser coils, a failed evaporator fan motor, a faulty start relay on the compressor, or a defrost system failure. Most of these parts cost under $100 and can be replaced in under an hour. If your refrigerator is not cooling, call 911 Appliance Repair at 800-929-1192 for same-day service in San Diego.

Common Causes of a Refrigerator Not Cooling

1. Dirty Condenser Coils

The condenser coils release heat from inside the refrigerator to the outside air. When the coils become covered in dust, pet hair, and grease, they cannot release heat efficiently. The compressor runs longer and harder, and the refrigerator may stop cooling properly or stop cooling entirely. This is the most common and easiest-to-fix cause of a refrigerator not cooling.

How to check: Locate the condenser coils. On most refrigerators, they are on the back or underneath the unit, behind a kick plate at the bottom front. If they are visibly dusty or caked with lint, clean them with a coil brush or vacuum with a brush attachment. Unplug the refrigerator before cleaning.

Important: Clean your condenser coils every 6 to 12 months to prevent cooling problems and extend the life of your compressor.

2. Evaporator Fan Motor Failure

The evaporator fan circulates cold air from the freezer into the refrigerator compartment. If the fan motor fails, the freezer may still be cold but the refrigerator will be warm. This is one of the most common causes of a refrigerator not cooling while the freezer still works.

How to check: Open the freezer door and listen for the fan. You should hear it running when the freezer door is open (the light switch may need to be pressed to activate it). If you do not hear the fan, or if the fan is noisy or grinding, the motor may need replacement. Access the evaporator fan behind the back panel of the freezer compartment and test the motor with a multimeter for continuity.

Cost to replace: An evaporator fan motor typically costs $50 to $120 for the part, plus labor. Total repair cost is usually $150 to $280.

3. Condenser Fan Motor Failure

The condenser fan cools the condenser coils and the compressor. If this fan fails, the compressor can overheat and shut off, causing the refrigerator to stop cooling. The condenser fan is located near the compressor, usually underneath or at the back of the refrigerator.

How to check: Pull the refrigerator away from the wall and remove the lower back panel. Locate the condenser fan near the compressor. Make sure nothing is blocking the fan blades. Spin the blades by hand to check for resistance. Test the fan motor with a multimeter for continuity. If the motor shows no continuity or the blades do not spin freely, replace the motor.

4. Faulty Start Relay or Capacitor on Compressor

The start relay helps the compressor start. If the start relay fails, you may hear a clicking sound every few minutes as the compressor tries to start but cannot. The refrigerator will not cool at all. The start capacitor, if equipped, gives the compressor an extra boost to start and can also fail.

How to check: Unplug the refrigerator. Locate the compressor at the back or bottom. Remove the start relay from the side of the compressor. Shake the relay. If it rattles, it is likely burned out and needs replacement. Test the relay with a multimeter for continuity. If the relay shows no continuity or rattles, replace it. Also test the start capacitor with a multimeter if equipped.

Cost to replace: A start relay typically costs $20 to $50 for the part, plus labor. Total repair cost is usually $120 to $220.

5. Frosted Evaporator Coil or Defrost System Failure

The defrost system melts frost buildup on the evaporator coils several times a day. If the defrost heater, defrost thermostat, or defrost control board fails, frost builds up on the coils and blocks airflow. The freezer may still be cold, but the refrigerator compartment warms up because cold air cannot circulate past the ice.

How to check: Remove the back panel inside the freezer compartment. If the evaporator coil is covered in thick frost or ice, the defrost system has failed. Test the defrost heater with a multimeter for continuity. Test the defrost thermostat, a small disc-shaped component clipped to the evaporator coil, for continuity at freezer temperature. If either component shows no continuity, replace it. If both test good, the defrost control board or defrost timer may be the problem.

Cost to replace: A defrost heater costs $30 to $80 for the part. A defrost thermostat costs $15 to $40. Total repair cost is usually $130 to $250.

6. Bad Temperature Control Thermostat

The temperature control thermostat, also called the cold control, regulates power to the compressor and fans based on the temperature setting. If it fails, the refrigerator may not cool at all, or may run continuously. This is less common than the other causes but does happen.

How to check: Turn the thermostat from the lowest to the highest setting and listen for a click. If you do not hear a click, the thermostat may be bad. Test the thermostat with a multimeter for continuity at the coldest setting. If it shows no continuity, replace it.

7. Failed Compressor

The compressor is the heart of the refrigeration system. If it fails, the refrigerator will not cool at all. Compressor failure is one of the most expensive repairs and is more common on older refrigerators. A failed compressor may be caused by dirty condenser coils, a bad start relay that was not replaced, or simple age.

How to check: If the start relay and capacitor test good, the condenser coils are clean, and both fans run, but the compressor does not start or runs but does not cool, the compressor may have failed. This requires professional diagnosis, as compressor replacement involves recovering and recharging refrigerant.

Cost to replace: A compressor replacement typically costs $400 to $700 including parts, labor, and refrigerant recharge. On refrigerators older than 10 years, replacement of the entire refrigerator may be more cost-effective.

8. Airflow Blockage or Overloaded Shelves

Refrigerators, especially French-door and bottom-freezer models, rely on airflow vents between the freezer and refrigerator compartments. If these vents are blocked by food items or if the shelves are overloaded, cold air cannot circulate and the refrigerator will not cool properly.

How to check: Check the vents inside the refrigerator compartment, usually at the top back or middle back. Make sure no food items are blocking the vents. Rearrange items to allow airflow. Check that the air damper, which controls the flow of cold air from the freezer to the refrigerator, is open and not stuck.

Brand-Specific Refrigerator Not Cooling Issues

Samsung Refrigerator Not Cooling

Samsung refrigerators commonly fail to cool due to a defrost system failure that causes ice buildup on the evaporator coil. Samsung French-door models are particularly prone to this issue. The evaporator fan motor can also fail. Samsung refrigerators may display error codes like 21E, 22E, or 25E when a cooling problem is detected. Check the defrost system first, then the evaporator fan.

LG Refrigerator Not Cooling

LG refrigerators commonly fail to cool due to a failed evaporator fan motor or a faulty linear compressor. The linear compressor in some LG models has been the subject of class-action lawsuits due to failure rates. LG refrigerators may also have defrost system failures. Check the evaporator fan first, then the defrost system, then the compressor.

Whirlpool Refrigerator Not Cooling

Whirlpool refrigerators commonly fail to cool due to a dirty condenser coil, a failed evaporator fan motor, or a faulty start relay on the compressor. Whirlpool top-freezer models often have evaporator fan failures. Check the condenser coils first, then the fan, then the start relay.

GE Refrigerator Not Cooling

GE refrigerators commonly fail to cool due to a failed defrost system or a faulty motherboard (main control board). GE side-by-side models are particularly prone to motherboard failures. Check the defrost system first, then the evaporator fan, then the control board.

Kenmore Refrigerator Not Cooling

Kenmore refrigerators are manufactured by Whirlpool, LG, or GE depending on the model. Check the model number prefix to determine the manufacturer, then follow the corresponding troubleshooting steps above.

Frigidaire Refrigerator Not Cooling

Frigidaire refrigerators commonly fail to cool due to a failed evaporator fan motor or a faulty defrost timer. The condenser fan motor can also fail. Check the evaporator fan first, then the defrost system, then the condenser fan.

Maytag Refrigerator Not Cooling

Maytag refrigerators, manufactured by Whirlpool, share the same common cooling problems. The evaporator fan motor, defrost system, and start relay are the most common culprits. Check the condenser coils first, then the fan, then the defrost system.

KitchenAid Refrigerator Not Cooling

KitchenAid refrigerators, also manufactured by Whirlpool, share the same cooling issues. The defrost system and evaporator fan motor are the most common culprits. Check the defrost system first, then the fan, then the start relay.

Amana Refrigerator Not Cooling

Amana refrigerators, also manufactured by Whirlpool, share the same cooling issues. The start relay and evaporator fan motor are the most common culprits on Amana bottom-freezer models.

How to Troubleshoot a Refrigerator Not Cooling: Step by Step

1. Check the basics: Make sure the refrigerator is plugged in and the circuit breaker has not tripped. Check that the temperature setting has not been accidentally changed.
2. Check airflow: Make sure no food items are blocking the vents inside the refrigerator or freezer. Rearrange items if needed.
3. Clean the condenser coils: Unplug the refrigerator and clean the condenser coils with a coil brush or vacuum. This alone fixes many cooling problems.
4. Check the evaporator fan: Open the freezer door and listen for the fan. If you do not hear it, test the fan motor with a multimeter.
5. Check the condenser fan: Pull the refrigerator out and check the condenser fan near the compressor. Make sure the blades spin freely.
6. Test the start relay: Remove the start relay from the compressor and shake it. If it rattles, replace it. Test with a multimeter for continuity.
7. Check for frost buildup: Remove the back panel inside the freezer and inspect the evaporator coil. If it is covered in ice, the defrost system has failed.
8. Test the defrost components: Test the defrost heater and defrost thermostat with a multimeter for continuity.

If you are not comfortable working with electrical components or moving a heavy refrigerator, call a professional. Refrigerator repair involves electrical components, and compressor replacement requires EPA-certified refrigerant handling.

When to Call a Professional for Refrigerator Repair

Call 911 Appliance Repair if:

• You have cleaned the condenser coils and checked airflow but the refrigerator still is not cooling
• You do not have a multimeter or are not comfortable testing electrical components
• The freezer is cold but the refrigerator is warm, which often indicates a fan or defrost problem
• You hear a clicking sound from the compressor, which may indicate a failed start relay
• There is ice buildup inside the freezer or refrigerator compartment
• You suspect a compressor problem, which requires professional diagnosis

Refrigerator Repair Costs in San Diego

Part	Part Cost	Total Repair Cost (Parts + Labor)
Condenser coil cleaning	$0	DIY
Start relay	$20 to $50	$120 to $220
Evaporator fan motor	$50 to $120	$150 to $280
Condenser fan motor	$40 to $100	$140 to $260
Defrost heater	$30 to $80	$130 to $250
Defrost thermostat	$15 to $40	$120 to $220
Temperature control thermostat	$30 to $80	$130 to $250
Control board	$100 to $300	$250 to $500
Compressor	$200 to $450	$400 to $700

At 911 Appliance Repair, our $49.95 house call is free when you approve the repair. We provide upfront pricing before any work begins, and every repair is backed by a 1-year warranty on parts and labor.

Preventing Future Refrigerator Cooling Problems

• Clean the condenser coils every 6 to 12 months. Dust and pet hair on the coils force the compressor to work harder and shorten its life. Use a coil brush or vacuum with a brush attachment.
• Do not overload the shelves. Cold air needs space to circulate. Keep items away from the vents inside the refrigerator and freezer compartments.
• Check the door seals. A torn or loose door gasket lets cold air escape and warm air in, forcing the compressor to run continuously. Replace damaged gaskets promptly.
• Keep the refrigerator away from heat sources. Do not place the refrigerator next to the oven, dishwasher, or in direct sunlight. Heat sources make the compressor work harder.
• Set the correct temperature. The FDA recommends 37 degrees Fahrenheit for the refrigerator and 0 degrees for the freezer. Setting the temperature colder does not cool faster, it just wastes energy.

If your refrigerator is not cooling and you need professional repair in San Diego, call 911 Appliance Repair at 800-929-1192. Same-day service is available for most calls, and we stock common refrigerator cooling parts in our service trucks for single-visit repairs.

Frequently Asked Questions

Why is my refrigerator not cooling but the freezer is working?

The most common cause is a failed evaporator fan motor, which circulates cold air from the freezer to the refrigerator compartment. Other causes include a frosted evaporator coil from a defrost system failure, a blocked airflow vent, or a stuck air damper. Check the evaporator fan first, then the defrost system.

How do I know if my refrigerator compressor is bad?

If the start relay and capacitor test good, the condenser coils are clean, and both fans run, but the compressor does not start or runs but does not cool, the compressor may have failed. You may hear a clicking sound every few minutes as the compressor tries to start. Compressor failure requires professional diagnosis and EPA-certified refrigerant handling.

Can dirty condenser coils cause a refrigerator to stop cooling?

Yes. Dirty condenser coils are one of the most common causes of a refrigerator not cooling. When the coils are covered in dust and lint, they cannot release heat efficiently. The compressor runs longer and may overheat and shut off. Clean the coils every 6 to 12 months with a coil brush or vacuum.

How much does it cost to fix a refrigerator that is not cooling?

Most refrigerator cooling repairs cost between $120 and $280, depending on the part. A start relay is the least expensive at $120 to $220, while an evaporator fan motor costs $150 to $280. A compressor replacement is the most expensive at $400 to $700. At 911 Appliance Repair, our $49.95 house call is free with repair.

Is it worth fixing a refrigerator that is not cooling?

In most cases, yes. The most common fixes (condenser coil cleaning, start relay, evaporator fan, defrost heater) cost $120 to $280, which is far less than buying a new refrigerator ($800 to $3,000). If your refrigerator is less than 10 years old and the repair costs less than half the price of a new unit, repair is the better choice. If the compressor has failed on a refrigerator older than 10 years, replacement may be more cost-effective.