Question about Sub-Zero Refrigerators

1 Answer

I get error message 24 EC , the service light flashes the refrig section won't go to below 42 degrees. It is a model 642, side by side.

Posted by on

  • purchaser Sep 15, 2009

    I tried disconnecting the unit for 10 minutes. Then plugged it in and waited overnight. The message has stopped appearing BUT the refrigerator side will not go below 42 degrees. The freezer side will go to the setting (i set it at -2 degrees). Is there a mixing unit of some sort between the freezer and refrigerator that might be preventing some of the colder air from reaching the refrigerator side?



1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Brigadier General:

    An expert that has over 10,000 points.

  • Master
  • 8,619 Answers


Thanks for using FixYa. Error code EC 24 means Defrost Under-heat. This error code means a fault in defrost system or freezer, but it is usually a false one. The control board on this vintage model didn't have the correct error code to report so it came up with the last code it knew.
You can try and reset the code by pressing and holding bell on/off key for 15 seconds. Also check if the condenser is plugged with dust bunnies.

Please do accept the solution if the issue is resolved or else revert for further assistance.


Posted on Sep 13, 2009

  • Rylee Smith
    Rylee Smith Sep 15, 2009


    Unfortunately your defrost system has gone
    faulty and you’ll need to replace the defrost thermostat and/or timer for
    correcting this issue. Please check the defrost timer first, if the timer is
    fine, then you’ll need to replace the defrost thermostat. You can check the
    timer and thermostat by using a multi meter. Also make sure that the condenser fan
    is working fine. You can buy the parts from this link---

    642 Parts

    Please do accept the solution if the issue is resolved or
    else revert for further assistance.





1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
New users get to try the service completely Free afterwhich it costs $6 per call and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Ec 40 code freezer at 14 degrees

That's an excessive run code. Is the freezer door frame hot? D you clean your condense and id the condenser fan motor running?

Oct 07, 2014 | Sub-Zero 642

1 Answer

Fridge and freezer at 50 degrees with settings on max cold. I can hear compressor cycling and all power is on. Suggestions?

Your Refrig/freezer should be set as follows:

Refrigerators: 36 to 40 degrees. Ideal temp is 37 Fahrenheit. Note: A temp above 42 degrees promotes bacteria.

Freezer: temp should be -5 to 6 degrees Fahrenheit. Ideal temp is 0 degrees.

Then check the door seals around the edges to see if any splits, tears or cracks have messed up the seal. This will cause your compressor to constantly run as it's trying to cool off the warm house is being sucked into the freezer (or Refrig). A sure sign the door seals are damaged is lots of ice in the freezer door area or water pooling in the bottom area of the refrigerator.

Wait about 4 hrs after you readjusted the Refrigerator/Freezer settings so everything settles down. If you still have problems then the coolant may need to be serviced (topped off) or the motor serviced/checked.

Don't procrastinate because a water heater and Refrig/freezer are the 2 largest energy users in your home- they run 24 hrs a day.

Hope this helps...

Nov 23, 2012 | Whirlpool 25.6 cu. ft. Side-by-Side...

1 Answer

No ice

The service light flashing usually indicates that there is a rise in the temperature of the machine, most likely caused by either the condensor coils being dirty or the condensor fan motor not running, either of which cause the compresor to run hotter than normal. The ice maker itself won't operate if the temperature rises above 10 degrees F, which is still well below freezing but its a fail safe to prevent flooding in the machine. I would take off the removeable grate and check the coils and clean them before I call anyone.

May 08, 2012 | Sub-Zero 642

1 Answer

Turn off code for sub zero refrig 642

Hi Dave,
On your control panel, do you have a (bell) logo? If so, press and hold that button unit the code disappears, it could take ten seconds or so, you should hear a beep. If not, turn the unit off for about 1-2 minutes by the control panel on/off switch, then when you turn it back on it should not re-appear. It depends on the model and version software in the unit on how to remove the service light and error codes. But if you continue to receive error codes you will need to have the unit looked at by a certified technician to prevent bigger problems down the road. I am a certified technician and willing to lead a hand when possible. You code 24 is a defrost over heat fault, which can happen from time to time, every-time I found this code I could never find an error in the system or defrost hardware, when I cleared the code, it never appeared again. I hope this helps.

Nov 06, 2011 | Sub-Zero 642

1 Answer

Sub zero ref 690 s model with error code ec 50 what is that

EC code is on with a flashing service light . Is this a problem that I can fix on my own?

May 26, 2010 | Sub-Zero 690 Side by Side Refrigerator

1 Answer

Freezer set to 0 actual temp - 1 Refrig side set to 37 actual temp drops to 30 and frezes items in refrig.

Set the refrig temp to 42 degrees . Also check to see if the damper (top left in refrig section ) is closing to stop the air flow into the fridge section . Sometimes they will stick due to ice build up inside the damper . Sometimes also , putting a knife inside and wiggling it around , will break it free , however , it may have to be replaced along with the #1 thermistor .

Aug 09, 2009 | GE (PSS26MSRSS) Side by Side Refrigerator

2 Answers

Sub-Zero 690 Refrig Side Ice Forming on Back Wall

replacing leaking evaporator on Sub Zero Video

Jun 09, 2009 | Sub-Zero 642

2 Answers

Subzero 690 flashing EC and service

Rhino, this is yet another simple fix. You need to call subzero and let them know that your ref section is not cooling properly. 9 out of 10 times it will be a problem with the evaporator coil needing replacement. Sub is aware of this issue and usually picks up the tab for this repair.

Mar 26, 2008 | Sub-Zero 632 / S

3 Answers

Subzero 690 flashing EC and service

If you replace the fan and clean the coils, and the refrigerator STILL does not cool, then contact SubZero or a service provider for an evaporator coil replacement.  Units manufacturer before mid-2003 had copper+aluminum coils that would corrode and allow all of the coolant to escape.  The (should be warranty) replacement is all aluminum.
Note the freezer does not have this issue due to the lack of liquid water.

Feb 20, 2008 | Sub-Zero 690 Side by Side Refrigerator

2 Answers

Service code EC?

05 Refrig. Cabinet Thermistor read open or shorted for 10+ seconds, or repeatedly read erratic temp’s
06 Refrig. Evaporator Thermistor read open or shorted for 10+ seconds, or repeatedly read erratic temp’s
07 Freezer Cabinet Thermistor read open or shorted for 10+ seconds, or repeatedly read erratic temp’s
08 Freezer Evaporator Thermistor read open or shorted for 10+ seconds, or repeatedly read erratic temp’s
20 Defrost Under-heat with No Voltage Feedback Through Gray/White Wire at Defrost Start
21 Defrost Overheat
22 No Voltage Feedback Through Gray/White Wire at Defrost Start
23 Defrost Overheat with No Voltage Feedback through Gray/White Wire at Defrost Start
24 Defrost Under-heat
30 Excessive Icemaker Water Valve Solenoid Activation (Exceeded 15 Seconds)
40 Excessive Freezer Compressor Run
50 Excessive Refrigerator Compressor Run

Jan 21, 2008 | Sub-Zero 632 / S

Not finding what you are looking for?
Refrigerators Logo

Related Topics:

128 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sub-Zero Refrigerators Experts

Charles T Nevin
Charles T Nevin

Level 3 Expert

4066 Answers

ACME Sub Zero...
ACME Sub Zero...

Level 2 Expert

41 Answers

Sal DeAngelo

Level 3 Expert

2248 Answers

Are you a Sub-Zero Refrigerator Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides