Sub Zero Refrigerator Freezer is Cold But Refrigerator is Warm – How to fix? by HoustonAuthorizedRepair.com 

The part(s) or condition(s) listed below for the symptom Refrigerator not cooling are ordered from most likely to least likely to occur. Check or test each item, starting with the items at the top of the page.

Most Frequent Causes for Refrigerator Freezer is Cold But Refrigerator is Warm

Cause 1 The Evaporator Coils are Frosted Over
The defrost heater assembly turns on a few times throughout the day to melt away any frost that may have accumulated on the evaporator coils. If the defrost heater assembly is defective, frost will continue to accumulate on the evaporator coils, and the coils will become plugged with frost. If the evaporator coils are frosted over, the airflow through the coils will be restricted, causing the refrigerator not to cool. Check the evaporator coils to determine if they are frosted over. If the evaporator coils are frosted over, test each component of the defrost system.
Cause 2 Evaporator Fan Motor
The evaporator fan motor draws cold air over the evaporator coils and circulates it throughout the freezer. If the evaporator fan is not working, the freezer or refrigerator will not cool adequately. To determine if the evaporator fan motor is defective, try turning the fan blade by hand. If the fan blade does not turn freely, replace the fan motor. Additionally, if the motor is unusually noisy, replace it. Finally, if the motor does not run at all, use a multimeter to test the motor windings for continuity. If the windings do not have continuity, replace the evaporator fan motor..
Cause 3 Damper Control Assembly
The air damper control opens and closes to let the proper amount of cold air into the refrigerator compartment. If the damper does not open properly, it won’t let enough cold air into the refrigerator. Check the damper control to determine if it is broken or stuck closed.
Cause 4 Thermistor
The thermistor monitors the refrigerator temperature and sends the temperature reading to the control board. The control board then regulates power to the compressor and evaporator fan based on the thermistor readings. If the thermistor is defective, the compressor and evaporator fan may not run when necessary, or may run too frequently. To determine if the thermistor is defective, test it with a multimeter. The thermistor resistance should change in conjunction with the refrigerator temperature. If the thermistor resistance does not change, or the thermistor does not have continuity, replace the thermistor.
Cause 5 Temperature Control Board
The temperature control board provides voltage to the compressor and fan motors. If the control board is faulty, it may stop sending voltage to the compressor or fan motors. Control boards are often misdiagnosed—before replacing the control board, first test all of the more commonly defective components. If none of the other components are defective, consider replacing the temperature control board.
Cause 6 Defrost Control Board
The defrost control board determines how often to run the defrost cycle. If the defrost control board fails, the refrigerator will not run the defrost cycle, and frost will continue to accumulate on the evaporator coils. If the evaporator coils are frosted over, the refrigerator will work harder to remove heat. As a result, the refrigerator may be too warm. If the defrost thermostat and defrost heater are working properly, the defrost control board is likely defective and will need to be replaced.
Cause 7 Defrost Timer
The defrost timer turns on the defrost heater several times throughout the day to melt any frost that may have accumulated on the evaporator coils. If the defrost timer is defective, it might not advance into the defrost cycle, or it might not send power to the defrost heater during the defrost cycle. If the defrost system isn’t working, frost will continue to accumulate on the evaporator coils, and the refrigerator will have to work harder to remove heat. As a result, the refrigerator may be too warm. To determine if the defrost timer is defective, slowly advance the dial into the defrost cycle. The compressor should turn off and the heater should turn on. If the timer does not send power to the defrost components or advance out of the defrost cycle within 30 minutes, this indicates that the defrost timer is not advancing. If the defrost timer is not advancing, replace it.
Cause 8 Defrost Thermostat
The defrost thermostat monitors the temperature of the evaporator coils. When the coils drop below a set temperature, the thermostat contacts close to allow power to flow to the defrost heater during the defrost cycle. In the defrost cycle, the defrost heater melts any frost that may have accumulated on the evaporator coils. If the defrost thermostat is defective, the thermostat contacts will not close. As a result, the thermostat won’t provide power to the defrost heater. To determine if the defrost thermostat is defective, use a multimeter to test it for continuity. If the defrost thermostat does not have continuity when it reaches the low temperature of its operating range, replace it.
Cause 9 Main Control Board
The main control board might be defective. However, the control board is very rarely the cause of the problem. Before replacing the control board, first test all of the more commonly defective components. If none of these components are defective, consider replacing the main control board.
Sub Zero Repair Los Angeles Calendar

Flexible Scheduling

You can book, change or cancel your Appliance repair appointment at any time online
Sub Zero Repair Los Angeles Protect

Appointment Updates

We’ll update you about your Appliance repair appointment via text, email or phone
Sub Zero Repair Los Angeles Reviews

Protection Plans

Protect all your home’s appliances and systems.

Some About Services

Professional service you can trust!

When you need appliance repair service. We are available for your call 24 hours a day, 7 days a week, and we offer same day service. We service and repair all major brands.

Our service call is free with any repair that we perform and we always provide a written estimate before the repair, which must be by you in order for us to complete the service

Schedule Appointment

Our Advantages

Sub Zero Repair Los Angeles Time

Fast And Convenient Service

Same Day Appointment Guarantee! Small 3 hours appointment window, no late arrivals!

Sub Zero Repair Los Angeles Subject

Free Estimate

If You Choose to Do the Repair With Us! Always Detailed estimates in writing!

Sub Zero Repair Los Angeles Quality

Quality Repair

Experienced technicians: Licensed, Fully Insured and Well-Trained to work with High-End Appliances!

Sub Zero Repair Los Angeles Money

Flate - Rate Pricing

No Hourly Rates, No Extra Charges For Late Hours or Weekends!

92% clients recommend our repair service

Excellent service

Arrived on time and completed service He was very courteous and made sure I had the correct parts to fix my the sears vent.

January 9, 2017

Good service

Thanks to the company, called the operator called back 10 minutes later a technician Tom, for 2 hours the technician was with me, the vacuum cleaner repaired quickly and efficiently. I will recommend.

January 29, 2017

Well done

I broke the oven timer LG, without it it was impossible to turn on the oven. Came technician Jim, determined damage and eliminated all done quickly and well. A skilled technician, I recommend this company!

January 30, 2017