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When Should fan in freezer come on?I replaced the heater and thermostat on the defrost system. The coils started freezing up right away when I turned it on.Is this normal,the fan has not came on yet!

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The fan should run any time the compressor is on if it is not on it is bad and needs to be replaced. When you take the back cover off make sure both leads are connected to the fan before you condemn it. Then take it out and keep the fan blades as you will use them on the new fan motor.

Posted on Apr 24, 2009

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1 Answer

Coils freeze up and fridge runs all the time till I melt coils.


There might be a few causes

Door Seal might be defective causing the door not to shut tightly this causes air from the room to get into the freezer through the opening and as the air comes in contact with the evaporator coils, it freezes. Normally the defrost system removes the ice but if the seal is defective the coils freeze too quickly and the defrost system cant keep up

If the freezer evaporator coils ice over, the defrost thermostat might be defective. Several times a day the defrost heater turns on for a few minutes to melt away any frost that may have accumulated on the freezer evaporator coils. In order for this to work, the defrost thermostat has to sense that the coils are cold enough. If the coils are cold enough the defrost heater will turn on. If the thermostat is defective it may not be able to sense the temperature of the coils and then won't turn on the defrost heater. If the defrost heater doesn't turn on, the evaporator coils ice over and eventually no air will be able to travel through the coils to provide cooling to the freezer. The defrost thermostat can be checked for continuity. It should have continuity when it reaches the low temperature of its operating range.

Jun 03, 2015 | Refrigerators

2 Answers

Not freezing


Hello Jim;

My name is Peter. I am a retired field service refrigeration technician.

If you are getting cooling and not freezing your problem is not your overload relay or capacitor, otherwise you would get no cooling at all.

You have one of 4 potential problems.

1.) Frozen Drain - This is a common problem. Your unit goes through a defrost cycle every 8-10 hours, everything shuts down for about 20-30 minutes. This is when your defrost heater turns on and defrost your cooling (evaporator) coil. If your drain is frozen, a wall of ice builds up behind your lower back wall. This prevents the cooling fan from running and air flow through the cooling coils.

You need to remove the lower back cover to see what is going on. there are several screws holding it on. First remove the rubber seals on both sides. They just pull out.

If it is a block of ice, use a hair dryer to melt the ice and clear the drain. Do not try to chip away, you will damage the coils.

2.) If you observe the cooling coil fan not running and vibrating, then you need to replace the fan.

not-freezing-q5gyx04vmzg44gwribm3t5si-2-0.jpg Part Number: Substitution: 3-60336-001 Cost from Sears: $115.00. You can search the internet and get this part for about $80.00.

3.) Defrost Heater - You may have a bad defrost heater. Observe, is the glass tube black or is the wire inside broken?
not-freezing-q5gyx04vmzg44gwribm3t5si-2-2.jpg Part Number: Substitution: 3-80405-003 Cost: $40.00

4.) Refrigerant leak or obstruction - If you observe a block of ice in the upper right hand corner of your cooling coil, then you either have a leak or an obstruction. A repair of this nature with a service company is about $500.00.

5.) Bad Bi-Metl (Thermostat) - In the upper right corner is your cooling coil thermostat.

not-freezing-q5gyx04vmzg44gwribm3t5si-2-5.jpg Part Number: Substitution: 1-81801-001 Cost: $30.00

If you observe the flat back has popped open, then replace.

Sep 12, 2013 | Whirlpool EV181NZTQ Upright Freezer

1 Answer

My fridge freezer freezes up inside


The first thing you want to do is open the freezer and see if the fan inside there is running. The reason is the freezer cools the refrigerator side by circulating air from the freezer. If the fan is running then your problem is one or more parts of the defrost system is malfunctioned and in return your problem arises. There are three parts to the system, the defrost timer or in some cases control board, defrost thermostat also known as a bi-metal, and the defrost heater. The defrost system is set up to operate as so. The defrost timer or control board will turn the machine off, in some cases every 8 hours, some 12. During this time period the defrost heaters, located behind the freezer wall and rest underneath the evaporator, yet wires to them run up the side of it, are energized and emit heat that raises upward to melt the ice that has formed on the evaporator coils. The bi-metal or defrost thermostat is at the top of the evaporator. When the heat from the heater starts to reach the bi-metal, it breaks the circuit turning the heater off. The whole purpose of this is because the freezer cool the refridgerator side by drawing air across the coils and blowing to the other side via the evap fan motor. In my opinion, if you change one part of the defrost system change them all because usually when one part fails another will follow, so save yourself the time and the food loss, the cost difference is minute.

May 29, 2012 | GE Refrigerators

1 Answer

Frigidaire side by side model # FRS20ZRGW3 coils freeze up on freezer side, fridge side gets warm


You have a defrost timer behind the front kick plate turn it clockwise slowly until compressor and fans stop. Once this happens the timer should remain off for 30 minutes and the defrost heater should come on during the first 15 minutes. If after 30 minutes the defrost timer part=> 215846602 Defrost Timer Assembly should come out of defrost and the compressor and fans should restart, if not advance the timer clockwise until they start and replace timer. Try that first and tell me what your results are. If that is not the problem then we can narrow this down to the defrost heater=> 218657301 Defrost Heater or 5303917954 Defrost Thermostat How to test the defrost heater is found on same page as the defrost heater. If you have any questions I will be here to help you, Thanks Sea Breeze


Apr 22, 2012 | Frigidaire Refrigerators

1 Answer

Fridge freezer problem


Sounds like the defrost system of your freezer is not working. It could be either the defrost timer, defrost thermostat or the heater has a problem. The defrost timer turns off the compressor periodically to sent power to the defrost heater via the thermostat. The defrost heater then powers up and heats the evaporator coil to melt the accumulated ice buildup on the cold coils. Most likely issues are that the timer motor is not advancing the timer or the heater itself has burned out.

Jul 14, 2010 | Freezers

2 Answers

Fisher and Paykel N500B fridge freezer. Freezer not freezing


The evaporator coil behind the cover on the back wall inside the freezer will ice up under normal conditions. Every 8 to 10 hours for around 20 minutes the defrost timer (or in most newer models the electronic adaptive defrost control) will turn the defrost heater on to melt the built up ice. There is a defrost thermostat which prevents the heater from overheating the freezer by breaking the heater circuit when the temp reaches close to 32 degrees F. The entire cooling system shuts off during the defrost cycle and starts back when the timer advances through the cycle.

If this ice is not melted it will continue to build up until the air can’t flow over the coil to circulate the cold air through the freezer and into the fridge. The temperature change in the fridge is usually noticed first followed by the freezer.

If the defrost thermostat is bad it can prevent the heater from coming on OR it won’t turn the heater off when it gets too warm. It is clamped to the evaporator coil at the top to sense the temp. If it appears to be misshapen it is bad.
With an ohm meter it should show continuity when cold and none when warm.
You can also bypass the thermostat to see if the heater comes on then. If it does then you know the thermostat is bad and needs replaced.

The defrost heater is located on the evaporator. It is in a tube which is at the bottom and can also go up the sides of the evaporator. On some types you can see a burnt spot if it’s bad. With an ohm meter it should show continuity from end to end when disconnected from the wiring in the freezer. You can also test the wiring for voltage when it’s in the defrost mode.

If you have a defrost timer you can test it. It can be located under the fridge behind the kick panel on the front. Some are in the fridge with the controls at the top. You can turn the defrost timer till it clicks and everything shuts down. The heater should now come on. If it does, replace the timer because that means the timer is not running. If it doesn't, check the heater and defrost thermostat. Turn the timer again till everything starts back up to end the defrost cycle.

If you have an adaptive defrost control instead of a timer, replace it if the heater and thermostat test good. It is located in the fridge with the controls in some models and on the back in others.

Oct 28, 2009 | Refrigerators

1 Answer

Freezer coils frost up within minutes after being turned back on


Your evaporator coils frost up in normal use and every eight hours or so the entire unit shuts down and the defrost heater comes on to melt the frost. This cycle last about 20 minutes. The melted frost drips into a drain pan and through a drain tube to the drain tray under the freezer/refrigerator where it's evaporated by the condenser fan.

If the evaporator coils behind the back panel of the freezer are icing up because of auto defrost failure that will stop the circulation of cold air and eventually affect the freezer too.

check defrost timer, defrost heater, defrost thermostat. In most newer models the timer has been replaced by an electronic control board. If the heater and thermostat are ok it’ll be the control.

You can turn the defrost timer till it clicks and everything shuts down. The heater should now come on. If it does, replace the timer. If it doesn't, check the heater and defrost thermostat. Turn the timer again till everything starts back up to end the defrost cycle.

How to check everything
http://www.acmehowto.com/howto/appliance/refrigerator/refrigerator.php




Aug 31, 2009 | Bosch Classixx KGV28323 Bottom Freezer...

1 Answer

GE Model # DSS25PFMD WW, lights and fan are working not cooling


If the evaporator coils behind the back panel of the freezer are icing up because of auto defrost failure that will stop the circulation of cold air and eventually affect the freezer too.

check defrost timer, defrost heater, defrost thermostat. In most newer models the timer has been replaced by an electronic control board. If the heater and thermostat are ok it’ll be the control.

You can turn the defrost timer till it clicks and everything shuts down. The heater should now come on. If it does, replace the timer. If it doesn't, check the heater and defrost thermostat. Turn the timer again till everything starts back up to end the defrost cycle.

Aug 21, 2009 | GE GSS25JEM Side by Side Refrigerator

5 Answers

Refrigerator freezes up


PLEASE DISREGUARD GUEST FIXYA SOLUTION,FREEZER PROBLEM PROCEDURE IF NOT DEGITAL,FIRST CHECK IF ICE ON BACK FREEZER WALL. STEPS-FIND DEFROST TIMER,BOTTOM FRONT ,BOTTOM BACK, INSIDE FRIG.ON CONSOLE,LISTEN TO SEE IF FAN IS RUNNING IF SO TURN THE DEFROST TIMER CLOCKWISE TILL YOU HEAR A CLICK SEE IF FAN TURNED OFF IF SO YOUR FREEZER IS IN DEFROST,FREEZER WILL COME OUT OF DEFROST IN 20-30 MINUTES IF IT DOES AND THE FAN COMES ON YOU HAVE ELIMINATED DEFROST TIMER&FAN,NEXT REMOVE BACK PANEL TO FREEZER IF THERE IS ICE FORMING REMOVE BOTH LEADS TO HEAT AND CHECK WITH VOLT METER ON OMES,IF YOU GET ANY READING THE HEATER IS GOOD,IF NO READING REPLACE HEATER AND CLIPON TEMINATOR,IF HEATER IS GOOD DEFROST COILS WITH HAIR DRYER TOP TO BOTTOM AND THIS WILL ALSO CLEAR THE DRAIN,IF EVERYTHING CHECK OUT GOOD DEFROST TIMER ,FAN ,HEATER, DRAIN, YOU NEED ONLY TO REPLACE THE LITTLE ROUND CLIP ON TERMANATOR,LET ME KNOW-MIKE

Oct 13, 2007 | Kenmore 55612 / 55614 / 5561 / 655619 Side...

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