Question about Kenmore 73502 / 73504 / 73509 Bottom Freezer Refrigerator

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Kenmore 596.75509400 bottom freezer defrost circuit test

Went into service test one. Readout indicates defrost thermostat open. Can't observe defrost heat and voltages. Unpluged defrost heater. Re-entered service 1. Display now indicates thermostat shorted. Voltage reads 120volts on plug-ins. Heater coil measure 29ohms which I think is right according to wiring diagram. How can I observe defrost? I plug connectors back in, enter service test 1 and am now back to thermostat open condition.

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  • Anonymous Aug 10, 2007

    Above should read observe defrost heat.

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If the thermostat is not cold enough it will be open and not allow the heater to come on. I would suggest you let the unit run for a few hours then check on the defrost cycle. in that time the terminator should close allowing the heater to work

Posted on Aug 10, 2007

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Fridg. not cooling. digital display not working, frezzer thawing.


he refrigerator/freezer defrost system can be checked by manually initiating a defrost cycle. There
are two methods of initiating the ADC Test Mode.
First Test Method:
1. Turn the thermostat off for 15 seconds.
2. Turn the thermostat on for 5 seconds.
3. Turn the thermostat off for 15 seconds.
4. Turn the thermostat on for 5 seconds.
5. Turn the thermostat off for 15 seconds.
6. Turn the thermostat on for 5 seconds.
7. Turn the thermostat off.
In 3 to 8 seconds the ADC should turn on the defrost heater (with the bimetal closed). NOTE: The test mode will terminate when the bimetal opens. If the refrigerator/freezer is already in defrost, Test Mode can be terminated by unplugging the refrigerator/freezer from the wall outlet and waiting 30 seconds before plugging it back in. The refrigerator/freezer should immediately go into cooling mode if the thermostat is closed.
If this first test procedure fails to make the ADC initiate a defrost cycle, try the following procedure to make the ADC begin the Test Mode.
Second Test Method:
1. Disconnect the refrigerator/freezer from the wall outlet for at least 30 seconds.
2. Turn the thermostat off.
3. Reconnect power to the refrigerator/freezer.
Within 3 to 8 seconds the ADC should turn on the defrost heater (with the bimetal close). If the unit fails to go into the defrost mode during this test, the problem may not be with the ADC. A defective bimetal may be the cause of the failure. The ADC will only go into a test mode if the bimetal
is closed. If the ADC senses an open bimetal it will return to the cooling mode within 3 to 8 seconds.
HELPFUL HINT: Upon entering the Test Mode, the relay mounted on the ADC board should turn off the compressor and turn on the defrost heater. Listen for the relay to click.
• If the relay clicks one time when entering the Test Mode, check for continuity in the defrost heater.
• If the relay clicks two times, check for an open bimetal.

Jun 11, 2011 | Whirlpool Refrigerators

Tip

Kenmore side by side is not cooling , and the coil at the back is freezing


Hi.

When the fridge is not cooling , and the coil at the back is freezing, the problem is always the defrost system.

The defrost system function is to prevent the condenser coils from freezing.

When the condenser coil is frozen, the unit will not cool down anymore, as heath connot be pumped out of the fridge and freezer.

The defrost system comprises of a defrost thermostat, a fan, and an heating element, and it is located behind the freezer firewall.

In the example below, taken from my daily Fixya solutions I will use a Kenmore side by side 363.50227000.

If your model is different, then you will need to order parts for your model, do not use the parts below. To find parts , try Sears, or see: Where do I find parts and diagrams for my...

Also diagram and parts location may differ.

Here a diagram, click on the picture to enlarge:

0ff253a.png


Here parts to be tested, click on the link to purchase part:

Defrost thermostat (part 240 on diag)

Is tested removing it from the unit, after disconnecting power firts. Test is done using a multimeter set at Rx1 (Ohms).
Ifthe part is good the multimeter will read low or zero impedance at roomtemperature, if thermostat is bad, it will stay open (infinity).



Heater (part 230)

Itis tested reading Ohms , similarly to thermostat, if the heater hascontinuity, then it is good, if circuit is open, it must be replaced.

evap fan asm (Part 613)
It is tested energizing the motor, and observing if it is working.


Thesystem can also be tested by jumping the defrost thermostat, and observing if the element is heating up and the fan working.

for safety reasons, all testing and repair must be done by a trained person.

Before attempting repair, better contacting Kenmore after sale service at the number listed on your owners Use and Care manual.


Ginko.

on Jan 28, 2010 | Kenmore 22.0 cu. ft. Side-By-Side...

1 Answer

We have a Kenmore Elite Freezer Model #253.29082994. We had the freezer plugged in and it was working fine. We unplugged it and moved it and now when we plug it in it won't start. Is there some kind of...


You refrigerator was made by Frigidaire Adaptive Defrost Controls Frigidaire Refrigerator Trouble Shooting and Diagnosing
On the initial plugin, or when power is restored to the fridge after a power outage:
If terminating thermostat is open, the fridge enters a compressor (cooling) cycle.
If the terminating thermostat is closed, the first defrost cycle occurs 1 hour
after initial plug-in.
Maximum defrost cycle time is 24 minutes.
Minimum time between defrost cycles is 6 hours. (compressor runtime)
Maximum normal clock time between defrost cycles is 12 hours.
Maximum time between defrost cycles (in "vacation" mode) is 72 hours.
Vacation mode is not entered unless the door has not been opened in at least 24 hours.
Note that the ADC will only enter the defrost mode if the terminating thermostat is closed. If the terminating thermostat is open when defrost is initiated, the ADC board will wait for six minutes and then return to the cooling mode.
ASSUMING that the fridge has been on and running,
and the terminating thermostat is closed,
defrost is initiated by pressing the door (light) switch
at least five times within six seconds.
The defrost heater should start heating up within 8 seconds.
If the above procedure caused the heater to heat up, the ADC board is probably bad; replace it.
If the defrost heater does not heat up, test the defrost heater, terminating thermostat and cold control for continuity as follows:
Unplug the fridge from the wall. Unplug the ADC board from its connector.
Test the connector for continuity between the following leads:
Defrost Heater = DEF TERM (blue) to DEF OUT (brown).
Terminating Thermostat = DEF TERM (blue) to NEUTRAL (lt blue).
Cold Control = COLD CONTROL (orange) to L1 (black).
Replace the defective component.

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Apr 26, 2011 | Kenmore Freezers

1 Answer

My Panasonic refrigerator NR-B420T is not cooling, however the freezer part still cooling.


Top of Form

Since there is cooling on the freezer the fault can be the defrost timer. So shut off the fridge and leave it off while you clean and check the evaporator for frost. If frost is seen it is a good indication as the compressor is working with sufficient gas within.
Now after about 6 hours plug in the fridge to start. Observe cooling to happen in about one hour and ice to from under three hours.
Earlier make sure that the thermostat was set to normal mode for freezer and fridge.
However if Ice forms then observe the fridge for about 24 hours for cooling to continue and the fridge to cut off . If not the auto defrost timer, or the thermostat must be checked.
If defrost timer works but frost keeps forming check while the compressor shuts if the heaters are working, check continuity of the heaters.
So try this test from the outside and make your observations so that we come to the solution.

Jan 05, 2011 | Panasonic Microwave Ovens

1 Answer

How do i get unit to go in deforst


The refrigerator/freezer defrost system can be checked by manually initiating a defrost cycle. There
are two methods of initiating the ADC Test Mode.
First Test Method:
1. Turn the thermostat off for 15 seconds.
2. Turn the thermostat on for 5 seconds.
3. Turn the thermostat off for 15 seconds.
4. Turn the thermostat on for 5 seconds.
5. Turn the thermostat off for 15 seconds.
6. Turn the thermostat on for 5 seconds.
7. Turn the thermostat off.
In 3 to 8 seconds the ADC should turn on the defrost heater (with the bimetal closed). NOTE: The test mode will terminate when the bimetal opens. If the refrigerator/freezer is already in defrost, Test Mode can be terminated by unplugging the refrigerator/freezer from the wall outlet and waiting 30 seconds before plugging it back in. The refrigerator/freezer should immediately go into cooling mode if the thermostat is closed.
If this first test procedure fails to make the ADC initiate a defrost cycle, try the following procedure to make the ADC begin the Test Mode.
Second Test Method:
1. Disconnect the refrigerator/freezer from the wall outlet for at least 30 seconds.
2. Turn the thermostat off.
3. Reconnect power to the refrigerator/freezer.
Within 3 to 8 seconds the ADC should turn on the defrost heater (with the bimetal close). If the unit fails to go into the defrost mode during this test, the problem may not be with the ADC. A defective bimetal may be the cause of the failure. The ADC will only go into a test mode if the bimetal
is closed. If the ADC senses an open bimetal it will return to the cooling mode within 3 to 8 seconds.
HELPFUL HINT: Upon entering the Test Mode, the relay mounted on the ADC board should turn off the compressor and turn on the defrost heater. Listen for the relay to click.
• If the relay clicks one time when entering the Test Mode, check for continuity in the defrost heater.
• If the relay clicks two times, check for an open bimetal.

Nov 26, 2010 | Whirlpool 25.6 cu. ft. Side-by-Side...

1 Answer

My refrigerator is warm, but the freezer seems to be fine.


Top of Form

Since frost is seen it is a good indication as the compressor is working with sufficient gas within.
Now after about 6 hours plug in the fridge to start. Observe cooling to happen in about one hour and ice to from under three hours.
Earlier make sure that the thermostat was set to normal mode for freezer and fridge.Since Ice forms then observe the fridge for about 24 hours for cooling to continue and the fridge to cut off . If not the auto defrost timer, or the thermostat must be checked.
If defrost timer works but frost keeps forming check while the compressor shuts if the heaters are working, check continuity of the heaters.
So try this test from the outside and make your observations so that we come to the solution.

Nov 24, 2010 | Jenn-Air JFC2089HE French Door...

1 Answer

The freezer is cold but the refrigerator is not as cold as it should.be I have the temp up to 45 I have vac out both back and front.


Top of Form

If frost is seen it is a good indication as the compressor is working with sufficient gas within.
Now after about 6 hours plug in the fridge to start. Observe cooling to happen in about one hour and ice to from under three hours.
Earlier make sure that the thermostat was set to normal mode for freezer and fridge.SInce there is formation of Ice then observe the fridge for about 24 hours for cooling to continue and the fridge to cut off . If not the auto defrost timer, or the thermostat must be checked.
If defrost timer works but frost keeps forming check while the compressor shuts if the heaters are working, check continuity of the heaters.
So try this test from the outside and make your observations so that we come to the solution.

Nov 24, 2010 | Washing Machines

1 Answer

Automatic defrost not working, but manual is?


Yes if the heater and defrost thermostat are good then the problem is the control board.

Sep 04, 2009 | Amana ARS266ZBS Side by Side Refrigerator

2 Answers

Frig Freezing Up/Frig side warming up Maytag MSD2454GRW


I think your voltage is fine I just believe the defrost timer is worn out and not cycling properly resulting in less defrost and higher refrigerator temperatures. Thanks, sea Breeze

Aug 26, 2009 | Maytag MSD2454G Side by Side Refrigerator

1 Answer

Whirpool frost free-fridge temp is not working


The refrigerator/freezer defrost system can be checked by manually initiating a defrost cycle. There
are two methods of initiating the ADC Test Mode.
First Test Method:
1. Turn the thermostat off for 15 seconds.
2. Turn the thermostat on for 5 seconds.
3. Turn the thermostat off for 15 seconds.
4. Turn the thermostat on for 5 seconds.
5. Turn the thermostat off for 15 seconds.
6. Turn the thermostat on for 5 seconds.
7. Turn the thermostat off.
In 3 to 8 seconds the ADC should turn on the defrost heater (with the bimetal closed). NOTE: The test mode will terminate when the bimetal opens. If the refrigerator/freezer is already in defrost, Test Mode can be terminated by unplugging the refrigerator/freezer from the wall outlet and waiting 30 seconds before plugging it back in. The refrigerator/freezer should immediately go into cooling mode if the thermostat is closed.
If this first test procedure fails to make the ADC initiate a defrost cycle, try the following procedure to make the ADC begin the Test Mode.
Second Test Method:
1. Disconnect the refrigerator/freezer from the wall outlet for at least 30 seconds.
2. Turn the thermostat off.
3. Reconnect power to the refrigerator/freezer.
Within 3 to 8 seconds the ADC should turn on the defrost heater (with the bimetal close). If the unit fails to go into the defrost mode during this test, the problem may not be with the ADC. A defective bimetal may be the cause of the failure. The ADC will only go into a test mode if the bimetal
is closed. If the ADC senses an open bimetal it will return to the cooling mode within 3 to 8 seconds. 
HELPFUL HINT: Upon entering the Test Mode, the relay mounted on the ADC board should turn off the compressor and turn on the defrost heater. Listen for the relay to click.
� If the relay clicks one time when entering the Test Mode, check for continuity in the defrost heater.
� If the relay clicks two times, check for an open bimetal.

Jan 06, 2009 | Whirlpool Refrigerators

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