ZISS420NNKSS General Electric Refrigerator - Instructions

My refrigerator was making a high pitched kind of howling noise. The PartSelect symptom that was closest was “unusual noise” and when I clicked that it said the evaporator fan motor fixes the symptom 32% of the time. Since my freezer fan speed sounded like it was constantly changing I went ahead and bought one which PartSelect delivered promptly. The installation video was great and although my freezer was not identical to the one in the video, the video was still very helpful. The only thing it didn’t say was how to tell if my freezer motor was the one with the thermistor although I suspect that they all are and that PartSelect is simply trying to save us money by showing us how to splice in a motor without a thermistor. Anyway, since I would have had to disassemble the freezer before buying the part to find out for sure, I just bought the one without the thermistor. This just meant I had to splice the new motor in, just like in the video. I think I would have preferred buying the motor with the thermistor even though it was more expensive. In the end my problem is solved so I’m happy. This is the third time that I’ve had to repair this GE refrigerator and PartSelect has been a valuable resource each time.

Replaced above parts and the noise problem was not resolved. Ordered a new motor, fan blade and another set of grommets from PartSelect. The parts were delivered the next day. Took me about 15 minutes to swap the new parts in. It's been 3 days since the repair and the noise has not returned.

followed you online video and it was easy and simple repair only took about an hour frig is back quiet and working fine thanks also parts come fast

i followed a video that was on your site, the video couldn't have been easier to follow it was step by step and very easy to follow, i replaced the evaporator fan motor and everything is working fine, i did notice that the evaporator coil was frozen pretty bad when i removed the back freezer panel i am going to check it again in a couple of weeks to make sure i don't have a defrosting problem as of now everything is fine i am hoping it was just the bad fan motor causing the coil to freeze up because of no air movement over the coil

Unplugged unit and removed vented cover over compressor section. The run capacitor is a simple fix 1 Phillips head screw and 2 spade wire connectors. For the temperature sensor I had to remove all drawers and the ice maker to remove the back cover to expose the condenser. Put a bowl at the drain stem in the rear of the unit and used a heat gun to defrost the coils on the condenser. Cut the wire about 3" from the sensor end . cut about the same off the new sensor stripped the wires put shrink wrap on each wire, attached butt connecors . heat gun for the shrink wrap and reassembled everything. Simple job that took about a half hour to do both. I will monitor the fridge for a couple of weeks to see if I need to change the control board.

it was easy the only thing was i had to cut old harness to remove 2 wires that went to coil that had to go back in the new harness other then that a peice of cake.

Ironically I did this today, as this email request came up asking how it went. I'm not a repairman, I'm a software engineer, and I can't thank this site enough for the step by step videos. With the video to help, this was a breeze, I was nervous as I had to empty all my freezer out onto the living room floor. Once that was done the repair took about 30 minutes. Thank you partselect!!!!! My second time doing business here, and I'll be coming back (well, if something breaks, so let's hope I don't have to).

I have a GE Profile French door refrig. It's only about 4 yrs old and the defroster stopped working. I read the other repair stories and was able to narrow it down to either the temp sensor, defrost timer, or main board. The refrig section was up to about 47 degrees and freezer was around 25. I could tell it was trying to cool but couldn't. So I tried the temp sensor first. I cut and spliced the new sensor on the outlet of the Evap. Coil and it took about 15 mins. Turned refrig back on and waited. The coil started to ice over after about 5 hrs I left the back panel off so I could see if and when then heater kicked on. After about 8 hrs I looked in and saw a faint glow and water trickling down and running out the drain. Turned out the sensor was bad and wasn't telling the main board it needed to defrost. I would try the sensor if you are having the same issues before spending a lot of money on the main board, defrost heater and or timer.

1. Removed and tested defrost heater, tests good. 2. Reinstalled defrost heater. 3. Removed and tested defrost over-temperature sensor, tests good. 4. Reinstalled over-temperature sensor using soldering iron, dielectric silicone grease, and heat-shrink tubing. 5. Removed the control printed circuit board and checked for blown fuse's, fuse's are all good. 6. Removed the defrost relay from the printed circuit board using soldering iron, bench tested the relay, it is good. 7. Soldered defrost relay back onto the circuit board, and reinstalled control board. 8. Removed and bench tested evaporator thermistor, the resistance is out of specification, ordered new thermister. 9. Installed new thermistor using soldering iron, dielectric silicone grease, and heat-shrink tubing. 10. Re-assembled refrigerator. 11. Installed temperature monitoring and recording instrumentation for 72 hour test. The defrost cycle is running correctly with a defrost termination temperature of around 90 deg-f. The defrost cycle ran twice while running the 72 hour test. 11. Removed test instrumentation and Put the unit back into service, The thermistor was the culprit. I bought the right part on the first shot, nice.

Had to remove all the covers and fans to expose the condenser, which was difficult as the parts were frozen to it. The styrofoam covering the condenser made it almost impossible to defrost it. Therefore, I ripped the styrofoam off to expose the condenser. Was not really difficult to fix the styrofoam cover using metal tape. Replaced temperature sensor in aluminum block, and used butyl sealant to secure. Had to also re-install parts of ice-ball kit that were not well covered. Lots of parts to keep track of, but anyone could do it.

had to rewire the harness in place in freezer. should have removed door for more room to work . easy job if you have 4 foot arms and a 1 foot chest.

I ordered 3 temperature Sensors Part#PS304103 and viewed the video. Got there, opened the frig. and it looked totally different and no place in any part of this frig. that took these sensors as viewed on the video. Totally baffled why these parts were listed for this frig. there was no place in this frig that would access for these parts. Serial # was HR443071.Maybe this model is out of date for these parts. Trying to find someone who can repair it. Any ideas???Purchased this GE in 2008. Model #is GSS25WSTFSS Thanks, for your help. JIM

After replacing the Defrost Thermostat, Defrost Heater Assembly, and the Main Board, I concluded that the problem must be the Defrost Thermistor, which I replaced in less than 10 minutes and it fixed the problem! I cut the wires on the old thermistor and connected the new one after stripping the wires and taped the new connections with electrical wire. Fast and easy repair (the last part anyway ;).

First, I had to remove the freezer drawer front. This is 8 large phillips head screws. then remove the plastic cover over the drawer slides. to do this, remove the white center screw from the slide near where it attaches to the drawer front. then the plastic cover will slide off pushing to the rear of the slide. take off the slides from the freezer walls by removing the phillips screws and pulling them towards you. They have tabs/slots in the rear. remove the center tray support and support bars, too. the icemaker has to come out, that is just 2 phillips screws but you also have to disconnect the electrical connector. just squeeze the locking wings and rock/pull. a screw in the top center of the back panel comes out. Lift and pull the back panel out. The evaporator coil appears. The thermocouple is attached to the coil in the upper right. Cut that one's wires and take it out. Just cut back about an inch from the back of the thermocouple, there is not much slack. Seperate and strip the wires back about 3/8 inch. Do the same for the new thermocouple. I twisted the wires together and used a solder sleeve to join the wires. The sleeve is just a little plastic tube that has a ring of solder in it that melts with heat gun heat. You can join the wires using butt connectors or whatever method appeals to you. I just wound the extra wire and put a cable tie around it, there is plenty of hiding space in that area. Make sure the new thermocouple is contacting the coil firmly.At this point, for a test, I left everything apart, propped the drawer against the opening and plugged the fridge in. Note that the evaporator fan will not start spinning immediately! It will just sit there making little bumps like it wants to go. The temp in the coil has to get settled before the electronics in the refridge will tell the fan to spin. It takes maybe 20 minutes. Reassemble. Fridge and freezer work great. It does take several hours for all to get cold again.

Replaced all the sensors in both the feezer and refrigerator.Even though it colder now it still is not cold enough.Freezer won't freeze items but is cold and refrigerator still not real cold