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I replaced defrosttimer,unit goes in defrost,but heater strips don't come on. i ohm-ed out strips and they are good

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The bi metal thermostat has failed. This is usually clipped on the evaporator coil. They are inexpensive and easy to replace. Sometimes you will see a burn mark on the housing. Here is a link that should help http://appliancehelponline.com/refertopdefrosttstat.html

Posted on Sep 15, 2010

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My GE profile side by side defroster stopped working. I have a ice build up at the bottom. defrosting it by shutting off and restarting after it all melted did not work. Any suggestions? Thanks, Don


Hello Don,
Here is what to check on the defrost system ;

DEFROST HEATER ...remove back wall of freezer and you will see a black heater at the bottom of the coil thats frosted up,it looks similar to the bake element in your oven,or in some cases it is going to be a spiraled wires inside of a glass tube. To check it,use a multimeter set to the lowest ohms of resistiance setting and follow and find the wires at the top of that frosted coil,unplug/disconnect those wires and check for continuty with around 5-20 ohms of resistiance. If it has that amount of ohms the heater is good. If your meter display does not change or displays OL the defrost heater is broke and needs to be replaced

DEFROST TERMINATION THERMOSTAT... it's round and has 2 wires and clips to the top of that frosted up coil. IT MUST BE CHECKED WHEN COLD SO BEST TO DO WHEN FROST IS STILL BUILT UP. To check it disconnect the wires on it and check for ZERO ohms of resistiance. As with the heater if the meter display OL or doesnt change,it is the problem

DEFROST CONTROL...it is hard to check for a semi unskilled person and if the heater or defrost t-stat check good its going to be the problem. It will NOT be in the freezer it could be on back wall or inside the control panel in the refrigerator section.

Good luck,
Gene

While these pictures are for a different brand ALL refrigerators are similar and may look some what different than your but will be similar enough oldtech2332_10.jpgoldtech2332_11.jpg

Aug 23, 2011 | GE Refrigerators

2 Answers

I have a frigidaire side by side Mod FRS26ZGHB0 and the freezer coils keep freezing up


Hello,
Here is what to check to see what is wrong in defrost system;

DEFROST TIMER...it will be behind the kickplate/front grill under freezer door. Turn the part shown in the picture until the compressor turns off and if within 5 minutes the heater mentioned below turns on the defrost timer is going to be the problem. IF heater doesnt come on it will be one of the parts listed below.

DEFROST HEATER ...remove back wall of freezer and you will see a black heater at the bottom of the coil thats frosted up,it looks similar to the bake element in your oven,or in some cases it is going to be a spiraled wires inside of a glass tube. To check it,use a multimeter set to the lowest ohms of resistiance setting and follow and find the wires at the top of that frosted coil,unplug/disconnect those wires and check for continuty with around 5-20 ohms of resistiance. If it has that amount of ohms the heater is good. If your meter display does not change or displays OL the defrost heater is broke and needs to be replaced

DEFROST TERMINATION THERMOSTAT... it's round and has 2 wires and clips to the top of that frosted up coil. IT MUST BE CHECKED WHEN COLD SO BEST TO DO WHEN FROST IS STILL BUILT UP. To check it disconnect the wires on it and check for ZERO ohms of resistiance. As with the heater if the meter display OL or doesnt change,it is the problem

Good luck,
Gene
oldtech2332_9.jpgoldtech2332_10.jpg
While these pictures are for a different brand ALL refrigerators are similar and may look some what different than your but will be similar enough to yoursoldtech2332_13.jpg

Aug 17, 2011 | Frigidaire Refrigerators

2 Answers

Freezer is keeping food frozen but there is major frost build-up in the freezer compartment everywhere.


Hello,
That is going to be a problem with one of the components in the automatic defrost system. It is supposed to automatically defrost. Turning it off overnight to melt it will defiently help. If you are mechinacally inclined here is what to check.

DEFROST HEATER ...remove back wall of freezer and you will see a black heater at the bottom of the coil thats frosted up,it looks similar to the bake element in your oven,or in some cases it is going to be a spiraled wires inside of a glass tube. To check it,use a multimeter set to the lowest ohms of resistiance setting and follow and find the wires at the top of that frosted coil,unplug/disconnect those wires and check for continuty with around 5-20 ohms of resistiance. If it has that amount of ohms the heater is good. If your meter display does not change or displays OL the defrost heater is broke and needs to be replaced

DEFROST TERMINATION THERMOSTAT... it's round and has 2 wires and clips to the top of that frosted up coil. IT MUST BE CHECKED WHEN COLD SO BEST TO DO WHEN FROST IS STILL BUILT UP. To check it disconnect the wires on it and check for ZERO ohms of resistiance. As with the heater if the meter display OL or doesnt change,it is the problem

DEFROST CONTROL...it is hard to check for a semi unskilled person and if the heater or defrost t-stat check good its going to be the problem. It will NOT be in the freezer it could be on back wall or inside the control panel in the refrigerator section.

Good luck,
Gene

oldtech2332_9.jpgoldtech2332_10.jpg

Aug 16, 2011 | GE Profile Stainless Bottom-Freezer...

2 Answers

Botttom will not cool but top cools


Do you see frost built up on back wall of freezer if so it is not defrosting and this is what needs to be checked, remove back wall of freezer and check these;
Defrost heater-- it usually is at bottom of the evap. coil, to check it remove wires to it ,use a meter set to the lowest ohms setting and check for somewhere between 10-50 ohms if that is what yours is its good if meter reads OL replace defrost heater

Defrost thermostat-- if clips to the top of the evap. coil and is metallic,round , about the diameter of a quarter with a plastic side with 2 wires coming from it(do not confuse it w.thermister),remove wires and check for ZERO ohms WHEN TESTING IT MUST BE COLD so check it when frost is built up,IF meter reading is OL (WHEN COLD) its the problem

Defrost timer or defrost control if has digital display to show tempature
check timer(it could be anywhere except in freezer) by turning till you hear a click,the defrost heater should come on within 5 minutes if the heater does come on the timer is the problem and needs to be replaced,if the heater does not come on the above mentions parts (heater/t-stat) will be the problem.
defrost control is hard for unskilled lay persons to check SO IF heater and defrost t-stat are good replace control

Hope this helps,

Gene

Aug 03, 2011 | Frigidaire Freezer GLRT183TD

1 Answer

Refrigerator isn't cooling that well and freezer is building up with ice


If your unit is NOT a no frost/self defrosting unit, you will need to manually defrost it.

If it is a no forst style, then you will need to open up the back panel of your freezer and locate the defrost circuit components - defrost heater; defrost thermostat and defrost timer. The defrost heater normally looks like a short piece of rope lighting. You can check to find out if it is good with an ohm meter. Disconnect the defrost heater and put a lead on both ends - if you have continuity then it is good. If you don't replace it. The thermostat and timer are harder to check and if the defrost heater is good, I would advise you to replace both.

Jul 09, 2011 | Whirlpool Refrigerators

1 Answer

I'm getting ice buildup in on spot in my fridge. Whats causing that?


Defrost problem. Check, defrost timer, thermostat, heater are working properly.
First, locate the defrost timer which may hiddenbehind corners of the fridge at the back bottom, in some models located in theceiling of the fresh food section or behind the cold control cover. Once youlocate the defrost timer, slowly turn the screw in the middle of the defrosttimer with straight screwdriver until the fridge shuts off. Now it's indefrost. If the defrost heater(s) starts, replace the defrost timer and defrostthermostat. If the heater(s) does not start, unplug wire cord to check ohm testfor continuity of heater. If continuity is there, plug cord wire which givespower 120volts (check specification) to heater. If heater no starts, bypassdefrost thermostat by join the 2 wires in the defrost thermostat. If the heaternow comes on, replace the defrost timer and defrost thermostat. If the heateritself is bad, replace it. Thanks and hope helpful

Feb 16, 2011 | Delfield 4472N-18 Stainless Steel

2 Answers

DEFROST CYCLE IN FREEZER NOT WORKING PROPERLY BUILD UP OF ICE ON THE OUTSIDE/INSIDE OF ICE DESPENSER


1. Check defrost timer. 2. Check defrost thermostat. 3. Check defrost heater. One of this are more than one may be defective replace.
First, locate the defrost timer which may hiddenbehind corners of the fridge at the back bottom, in some models located in theceiling of the fresh food section or behind the cold control cover. Once youlocate the defrost timer, slowly turn the screw in the middle of the defrosttimer with straight screwdriver until the fridge shuts off. Now it's indefrost. If the defrost heater(s) starts, replace the defrost timer and defrostthermostat. If the heater(s) does not start, unplug wire cord to check ohm testfor continuity of heater. If continuity is there, plug cord wire which givespower 120volts (check specification) to heater. If heater no starts, bypassdefrost thermostat by join the 2 wires in the defrost thermostat. If the heaternow comes on, replace the defrost timer and defrost thermostat. If the heateritself is bad, replace it. Thanks and hope helpful

Jan 29, 2011 | GE (PSS26MSRSS) Side by Side Refrigerator

1 Answer

Hi,my fridge is not defrosting.what could be the problem?


First, you have locate the defrost timer which may hidden behind corners of the fridge at the back bottom, in some models located in the ceiling of the fresh foodsection or behind the cold control cover. Once you locate the defrosttimer, slowly turn the screw like wheel in the middle of the defrost timer witha straight screwdriver until the fridge shuts off. Now it's in defrost. Ifthe defrost heater(s) starts, replace the defrost timer and defrostthermostat. If the heater(s) does not start, unplug wire cord to check ohm test for continuity of heater. If continuity is there, plug cord wire which gives power 120volts (check specification) to heater. If heater no starts, bypass defrost thermostat by join the 2 wires in thedefrost thermostat. If the heater now comes on, replace the defrost timer anddefrost thermostat. If the heater itself is bad, replace it. Thanks and hope helpful.

Jan 28, 2011 | Wagan ThermoElectric FridgeWarmer

1 Answer

Hi there i have a client with an amana frigde sxd524ve fault is very ic ed up evap unit no fan running i defrosted unit and resarted system fan now running i believe defrost element and or timer may be...


Okay, rookie ;)
Amana fridges have problem with the defrost thermostat, which you may not notice without looking at the thermostat very closely. If the plastic cover on the thermostat is swollen or is higher on one side - replace the thermostat. Fan in these fridges is connected in series with the heater and the defrost thermostat.
... And finally 127 Ohms for a 110v heating element is too high, resistance must be lower. If you measure it through the defrost thermostat - separate them and check again.

Oct 14, 2009 | Amana SXD524VW Side by Side Refrigerator

1 Answer

Need photo of Defrost Switch or Sensor


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Unit needs to be cold when you test. it closes at around 20 or 30 degrees F and opens around 55 deg F

Jul 02, 2009 | Viking Professional VCBB363SS Stainless...

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