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How to test automatic defrost circuit - GE GSS25SGMBS Side by Side Refrigerator

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How do i engage defrost


"Frost free" fridges automatically cycle in and out of defrost mode a couple (or more) times a day. There is no user intervention required. If your frost free fridge is building up frost, there's a good chance that the defrost circuit has developed a problem.

before digging into the defrost circuit: If frost is building up only on a door or door opening - this is an indication of a poor freezer door seal. Once the seal is repaired or replaced, the frost should stop building up. If the frost is throughout the inside the freezer - and the temperature of the fresh food compartment and eventually the freezer is climbing - then it's more involved than a door seal.

Typical problems areas of the defrost circuit are: the defrost terminator or sensor, defrost timer assembly and defrost heating element. While the circulating fan(s) is not part of the defrost circuit - it is usually visible and should be checked when inspecting defrost heaters and terminator components in the freezer. If the fan(s) has failed or is otherwise unable to spin, it should be replaced.

If you need more help, please provide the brand and model fridge you have. Good luck!

Sep 27, 2011 | Refrigerators

2 Answers

Our Haier HF-100/A fridge is 3 years old since purchase (Co-Op), and appears to have developed a faulty refrigerant circulation circuit. The top two shelves of the compartment are no longer freezing down....


DC (Adaptive Defrost Control) is **generally** the issue on these....you can force a defrost by jumping L1 and Test on the board.

Some general info on how an automatic defrost works at:

http://www.applianceaid.com/defrost_cycle.html

Also, a little info on adaptive defrost controls at:

http://www.applianceaid.com/adaptive_defrost.html

Jul 01, 2008 | Haier Refrigerators

1 Answer

S by s has frost build up Model # GSH25JSRF-SS


You will have to check the continuity of the defrost system. You can check this by unplugging refrigerator, and testing the circuit from the main control board behind the refrigerator. If the circuit is not compromised, the problem is likely with the control board itself. If the circuit is not intact, you will have to open up the freezer and test all the individual defrost components. There are thermostats and thermistors that need to be tested in cold conditions, in other words, you will have to test them while there is frost on the evaporator. You can however test the defrost heater with or without frost on the evaporator.

If you have further questions, visit my website and send me a question. www.FixMyFridge.net

Mar 16, 2010 | GE (PSS26MSRSS) Side by Side Refrigerator

1 Answer

2007 Mercury Mountaineer the eatc will turn off


this is for 2002
Dual Automatic Temperature Control Module Self-Test The DATC module self-test will retrieve on-demand (hard fault) DTCs only, it will not retrieve continuous DTCs. Continuous DTCs can be cleared when exiting the DATC module self-test. Make sure to retrieve continuous DTCs by carrying out the Dual Automatic Temperature Control Module — Retrieve Continuous DTCs procedure before clearing any continuous DTCs.
  • The DATC module self-test will not detect concerns associated with data link messages like engine coolant temperature or vehicle speed signals. A scan tool must be used to retrieve these concerns.
  • The DATC module self-test will detect concerns in the system control functions and will display on-demand (hard fault) DTCs for concerns that are present during the self-test. The vehicle interior temperature should be between 4°C - 38°C (40°F - 100°F) when performing the self-test. If the temperatures are not within the specified ranges, false DTCs may be displayed.
  • The self-test can be initiated after cycling the ignition switch from OFF to ON. Normal operation of the climate control system stops when the self-test is activated.
  • To enter the self-test press the OFF and FLOOR buttons simultaneously and release, then press the AUTO button within two seconds. The display will show a flashing blower icon for 20 seconds, after which all vacuum fluorescent segments will be displayed if there are no on-demand DTCs present. If DTCs are present the DATC module will display "00 00" and then on-demand DTCs. Record all DTCs displayed.
  • If any DTCs appear during the self-test, carry out the diagnostic procedure. Refer to the Dual Automatic Temperature Control Module Diagnostic Trouble Code Index and follow the ACTION for each DTC given.
  • If a condition exists but no DTCs appear during the self-test, GO to Symptom Chart Condition: The DATC System Is Inoperative, Intermittent or Incorrect Operation.
  • To exit the self-test and retain all continuous DTCs, press any button except DEFROST. The DATC module will exit the self-test and retain all continuous DTCs.
  • To exit the self-test and clear all continuous DTCs, press the DEFROST button. The DATC module will exit the self-test and all continuous DTCs will be cleared.
  • Always exit the self-test before powering the system down (system turned OFF). Once the self-test is exited the ignition switch must remain ON for at least 30 seconds to allow the temperature blend door actuators to automatically recalibrate.
  • Continuous DTCs will be deleted after 80 ignition switch ON cycles after the intermittent fault occurs.
Dual Automatic Temperature Control Module — Retrieve Continuous DTCs The DATC module will retrieve only continuous (intermittent) DTCs when carrying out this procedure.
  • Retrieval of continuous DTCs can be initiated after cycling the ignition switch from OFF to ON. Normal operation of the climate control system stops when retrieving continuous DTCs.
  • To retrieve continuous DTCs press the OFF and PANEL buttons simultaneously and release, then press the AUTO button within two seconds. All vacuum fluorescent segments will be displayed if there are no continuous DTCs present. Continuous DTCs are indicated by the presence of the degrees Celsius symbol (°C) on the DATC module display. Record all DTCs displayed.
  • If any DTCs appear, carry out the diagnostic procedure. Refer to the Dual Automatic Temperature Control Module Diagnostic Trouble Code Index and follow the ACTION for each DTC given.
  • If a condition exists but no DTCs appear, GO to Symptom Chart Condition: The DATC System Is Inoperative, Intermittent or Incorrect Operation.
  • To exit and retain all continuous DTCs, press any button except DEFROST. The DATC module will exit the retrieve continuous DTCs mode and retain all continuous DTCs.
  • To exit and clear all continuous DTCs, press the DEFROST button. The DATC module will exit the retrieve continuous DTCs mode and all continuous DTCs will be cleared.
  • Always exit the procedure before powering the system down (system turned OFF). Once the procedure is exited the ignition switch must remain ON for at least 30 seconds to allow the temperature blend door actuators to automatically recalibrate.
  • Continuous DTCs will be deleted after 80 ignition switch ON cycles after the intermittent fault occurs.

DTC Description Action Diagnostic Tool Display DATC Module Display B1251 1251 Air temperature internal sensor circuit open Go To Pinpoint Test A . B1253 1253 Air temperature internal sensor circuit short to ground Go To Pinpoint Test B . B1255 1255 Air temperature external sensor circuit open Go To Pinpoint Test C . B1257 1257 Air temperature external sensor circuit short to ground Go To Pinpoint Test D . B1259 1259 Solar radiation sensor circuit open Go To Pinpoint Test E . B1261 1261 Solar radiation sensor circuit short to ground Go To Pinpoint Test F . B1342 — ECU is defective INSTALL a new DATC module. B1676 1676 Battery voltage out of range CHECK circuit 729 (RD/WH) for a fault. If okay, REFER to Section 414-00 to diagnose the charging system fault. B2266 2266 Left side blend door circuit failure Go To Pinpoint Test G . B2267 2267 Right side blend door circuit failure Go To Pinpoint Test H . B2267 and B2268 2267 and 2268 Left side and right side blend door circuit failure Go To Pinpoint Test I . B2268 2268 Steering wheel climate control circuit open Go To Pinpoint Test J . B2269 2269 Steering wheel climate control circuit short to ground Go To Pinpoint Test K . B2477 2477 Module configuration failure RECONFIGURE the DATC module. REFER to Section 418-01.

Mar 01, 2010 | 2007 Mercury Mountaineer

1 Answer

ICE BUILD UP ON BACK FINS IN NORCOLD REFRIGERATOR


A part has failed in the auto defrost system - either the heater is bad, the defrost timer (could be a circuit board or old style timer) or the termination switch (temperature limiting thermostat). If you don't know how to test each one with a multi-meter, call a repairman.

Sep 19, 2009 | Refrigerators

1 Answer

Automatic defrost no longer works


If freezer is icing up, you might have a defrost problem. Frost free models have a heating element that is controlled by a timer to automatically defrost ice, defrost timer turns on defrost heating element every 12 hours to melt ice in freezer and allow good air flow.
You can test defrost element with an ohm meter(located inside freezer coils-will have two wires going to a plug connection), if OK replace defrost timer (located in various places depending on make and model

Aug 19, 2009 | Refrigerators

1 Answer

Kenmoore upright freezer cold but not freezing


Hi!

Thanks for using FixYa. First of all please check that there is air flow in the upper vent baffle in the fridge section which is located behind the crispers. If there is no air flow at the vent baffle in the upper fridge section then this is the cause of the issue you’re facing with. The evaporator fan pushes the air through ducting into the refrigerator from the freezer and if there is any material obstructing it then clear it.

If still the problem persists then you need to check the following things:

The defrost circuit contains defrost timer, defrost heater(s) and defrost thermostat. Defrost timer failure will not put power to the circuit. Defrost heater failure will fail to defrost when the timer applies power. Defrost thermostat must be closed for defrost to take place. First locate the timer, rotate the clutch head screw clockwise slowly until one distinct click is heard. Now the timer will be set in defrost mode and defrost should complete within 30 minutes or less after which the refrigeration should start cooling again. If defrost takes place and it does not go back to cooling automatically turn the screw once again until you hear the second click, unit will start. Replace the timer. If defrost does not take place in the time frame above and the unit restarts in cooling test the defrost heaters. From the heater(s) follow the wires from each end to where they plug into the circuit. Unplug them and test through the heaters with an ohm meter. You should get a reading if they are good, if no reading then you need to replace the heater(s). If you get a reading on the heater(s) then you need to replace the defrost thermostat.

Please do rate the solution and revert for further assistance.

Thanks
Rylee

Aug 14, 2009 | Kenmore Freezers

1 Answer

I'm getting frost in my freezer and loosing temperature in my frig


Hi, Unplug the refrigerator. The automatic defrost is not working properly. You will need to remove the rear panel inside the freezer section and test the defrost heater and bi-metal switch. The bi-metal switch located on the top of the evaporator coil needs to be tested while it is still cold. Check and see if the switch has continuity. If the bi-metal switch shows an open circuit, replace it. If it shows a closed circuit, test the defrost heater the same way. If both the defrost heater and the bi-metal switch are ok, the defrost timer will need changed.
You will need to defrost the evaporator coils with a hair dryer. Please let me know if this helps you at all or if I can assist you further.

Thanks
Vic

Aug 14, 2009 | Refrigerators

2 Answers

Ice forming on rear of freezer wall


The best way to determine what has caused a non defrosting GE electronic control model is to first access the control board. Jump terminals line power to defrost, (J4 and J9). An amp probe should be placed on this jumper wire to determine current draw of the defrost circuit. A three amp draw is what is normal for this circuit. This will eliminate checking behind the evaporator cover to determine a defective heater or over temp device (defrost terminator). Note: This test is only to check the defrost circuit. It does not initiate a defrost cycle. If the unit is in any other cycle than defrost, that cycle will continue to operate as well.

May 07, 2009 | GE (PSS26MSRSS) Side by Side Refrigerator

1 Answer

Freezer section works, refrigerator becomes warm.


In the defrost circuit there are three major parts. Defrost timer, defrost heater(s) and defrost thermostat. Defrost timer failure will not put power to the circuit. Defrost heater failure will fail to defrost when the timer applies power. Defrost thermostat must be closed for defrost to take place. FIRST located the timer, rotate the Clutch head screw clockwise SLOWLY until one distinct click is heard. Timer will be in defrost mode and defrost should happen in 18-22 minutes after which the refrigeration should start cooling again. If defrost takes place and it does not go back to cooling automatically turn the screw once again until you hear the second click, unit will start. Replace the timer. If defrost does not take place in the time frame above and the unit restarts in cooling test the defrost heaters. From the heater(s) follow the wires from each end to where they plug into the circuit. Unplug them and test through the heaters with an OHM meter. You should get a reading if they are good, if no reading replace the heaters. If you get a reading on the heater(s) replace the defrost thermostat.

Jun 11, 2008 | Refrigerators

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