Question about GE Monogram ZISS420NRSS 42" Built-In Side-By-Side Refrigerator (ZIS-S420NRSS, ZIS S420NRSS)

5 Answers

Evaporator fan not coming on - GE Monogram ZISS420NRSS 42" Built-In Side-By-Side Refrigerator (ZIS-S420NRSS, ZIS S420NRSS)

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  • carlos_de548 Oct 06, 2010

    Fan checks good,bypassed coil thermostats and motor
    Runs, replaced thermsts. Checked charge
    25/105 coil frosting but no fan
    This is a r12 unit model zisw42emd
    I've also checked fan switch

  • carlos_de548 Oct 06, 2010

    I've also had to put a start kit on it initially
    Because compressor was seized.

  • carlos_de548 Oct 06, 2010

    Ge monogram zisw42emd, evap fan not coming on,
    Units been down a week, compressor seized,installed start kit.
    Compressor running 2.5 amps pressures 25/105
    Replaced coil thermostats, evap fan not running.

  • carlos_de548 Oct 06, 2010

    No power to fan motor! Please fully read description of problem

  • carlos_de548 Oct 06, 2010

    Ge monogram zisw42emd, evap fan not coming on,
    Units been down a week, compressor seized,installed start kit.
    Compressor running 2.5 amps pressures 25/105
    Replaced coil thermostats, evap fan not running.motor checks good. The unit evap fan is getting no power. There are no pcb in circuit.

  • carlos_de548 Oct 06, 2010

    Ge monogram zisw42emd, evap fan not coming on,
    Units been down a week, compressor seized,installed start kit.
    Compressor running 2.5 amps pressures 25/105
    Replaced coil thermostats, evap fan not running.
    The evap fan cycles on after evap tstats get down to 25degrees
    There is no board, I'm an experienced tech with 20yrs exper.
    But this has me stumped

  • carlos_de548 Oct 06, 2010

    Ge monogram zisw42emd, evap fan not coming on,
    Units been down a week, compressor seized,installed start kit.
    Compressor running 2.5 amps pressures 25/105
    Replaced coil thermostats, evap fan not running.This is a 20 yr old built in, no pcb, compressor has been previously
    Been replaced(10+ years ago) condenser only getting hot
    At the top liquid line. The coil is frosting and the evap fan
    Is tied into the termination thermostats, the fan should start at 25 degrees. I've replaced both tstats with 45/25
    The schematic is missing.

  • carlos_de548 Oct 07, 2010

    The model # is zisw42emd not what keeps showing
    Up on the description. Where is the relay? Also when I bypass
    The coil thermostats the fan comes on. I've replaced them
    With 45/25.

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5 Answers

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  • Master
  • 503 Answers

Hi,

  • 1

    Before working on your refrigerator, always make sure you either unplug the unit or turn off the circuit breaker that powers it.

  • 2

    Remove all of the food items from your freezer and place them into a cooler to keep them from melting. The refrigerator's evaporator fan is located at the rear of the freezer compartment, so if you have an ice maker, you will have to turn off the water supply to it and remove the ice making machine.

  • 3

    With the freezer now empty, remove the panel that covers the evaporator fan. This is usually either held in place by screws or retainer clips. If yours features retainer clips, use the screwdriver to press the clips in to allow the panel to pop off. Just be careful you don't break the clips.

  • 4

    Remove the two screws that secure the fan housing in place. If you still don't have access to these screws, then you may have to remove the entire rear panel of the freezer.

  • 5

    When the evaporator fan is released, notice that there are two wires (or three depending on the make) attached to it. Draw yourself a schematic so you know exactly where these wires get connected once you are finished testing the fan.

    The wires are connected to the fan by slip-on connectors. Use the needle-nose pliers to pull the connectors off of the terminals. Pull them off by gripping the connector, NOT the wire. Inspect both the wire connectors and the fan's terminals for any signs of corrosion. Spin the fan's blade to make sure it spins freely and is not seized up.

  • 6

    With your evaporator fan now free, close the freezer door and find a flat, clean work surface to set the fan on. Set your multitester to read ohms, which is normally either the X1 setting or the RX1 setting, depending on the brand of tester.

  • 7

    Touch one probe to one of the fan's terminals and the other probe to the other terminal. The multitester should read "zero" ohms. If the tester reads anything other than "zero," then the fan should be replaced. If the tester does read "zero" and the fan blade spins freely, then reinstall the evaporator fan; it is still operating correctly.




  • Please post your feedback and Vote if the problem resolved as per your satisfaction.

    Posted on Oct 07, 2010

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    • Expert
    • 2,973 Answers

    Please check the wiring for the fan. And the relay that activates it. Either of the two may be malfunctioning and causing you problems.

    Posted on Oct 07, 2010

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    • Master
    • 17,970 Answers

    Next to your condenser fan (in the back) there is a black dome (compressor), do you hear it humming, is it hot to the touch?

    Well start off by setting your two controls in the middle (halfway between max and min). Normal operation of the refrigerator should be the compressor, the fan next to it (condenser fan) and the freezer fan (evaporator fan) all working at the same time.

    You would need to order the motherboard AND evaporator (freezer) fan motor, a few members have reported a bad evap. fan motor taking out the motherboard too; keep in mind that some models will need this motor if there is a thermistor at the motor harness.

    In this link could looking tha parts that you need replacement: Shop-For-Parts ZISS420NRSS

    Check this video for GE Refrigerator Fan Motor Diagnostics: VIDEO

    I hope helps.

    Posted on Oct 06, 2010

    • ZJ Limited
      ZJ Limited Oct 06, 2010


      It
      looks like the cold control to this unit may be in the freezer and the
      air damper / baffle is in the top left corner of the frig controlled by a
      control (thermostat) and also has a heater located beside it.

      Never been on one of these so I'm just guessing that the heater will
      also be involved keeping the thermostat in temp to keep the baffle open
      more or less or closed. Try checking that heater for continuity and
      also that thermostat would be my beginning. Again, I am sorry but I
      don't know this one and I hope others will pitch in to help ya out.

      I heard about f
      ound
      the parts breakdown and located the damper control. Priced a new
      derfrost timer and damper control: customer oppted to buy a new smaller
      unit, then wont work.



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    • Master
    • 1,796 Answers

    Hi!
    Evap. fan motor is defective,You can't lubricate or repair this motor. You must replace it. Click on the link for a pic. and price of the fan motor http://www.repairclinic.com/Motor-Parts?s=t-ZISS420NRSS-%3d%3dc53e
    The job of the evaporator fan inside the freezer compartment is to circulate the air of both the refrigerator and/or freezer to keep the temperature constant.
    Click on the following for a side by side refrigerator parts diagram to help you identify parts and location. http://www.repairclinic.com/Refrigerator-Side-By-Side-Appliance-Diagram
    To replace the fan motor, turn temp. controls off, disconnect unit form wall outlet, remove the freezer back panel, where the fan is, unplug fan from electrical connector, remove the tow fastening screws, remove fan blades, install blades on new motor and reverse disassembling procedure.
    Good Luck!!

    Posted on Oct 06, 2010

    • Rene J Solis Oct 06, 2010

      How about fan start relay on PCB, can you feel it click?? Compressor, Condenser fan and Evaporator Fan should come on when unit is just plugged into wall outlet. Try that please and let me know what happened

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    • GE Master
    • 1,711 Answers

    First you should know that evaporator fan is not working every time the compressor runs. When ambient temperature is hot then the evaporator fan is on for faster cooling of the evaporator.

    In any case you need a voltage tester so by removing the fan wires test across if you have a voltage difference but the motor was not running then you just need to replace the motor with new one.

    We have here below a link with parts layout of your fridge and you can find the code of your motor and even order the fan online.

    http://www.appliancepartspros.com/partsearch/model.aspx?model_id=5209001&diagram_id=22562225#d22562225

    Posted on Oct 06, 2010

    • espressonist
      espressonist Oct 06, 2010


      You need to have the condenser in very hot condition in order to have voltage across fan motor. Did you test in these conditions how much is temperature of the condenser on the top side and how much in the bottom. Also how often the compressor start and stop with door closed. Are the set temperatures reached in both refrigerator and freezer.

      And in any case just clarify if you have notice the fan work before is similar condition and now not.

      Just let us know what you have notice so we can be more specific to your problem.

      You need to have the condenser in very hot condition in order to have voltage across fan motor. Did you test in these conditions how much is temperature of the condenser on the top side and how much in the bottom. Also how often the compressor start and stop with door closed. Are the set temperatures reached in both refrigerator and freezer.

      And in any case just clarify if you have notice the fan work before is similar condition and now not.

      Just let us know what you have notice so we can be more specific to your problem.

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