ZISS420DNBSS General Electric Refrigerator - Instructions

luckly i have a bit of experience in refrigeration im an hvac technician by trade. this repair was a bit tricky in that i did not know at first if it was a Temperature Sensor issue or the main control board. I had tested the defrost termination thermostat and the defrost heater and as i suspected they were ok. Next i wanted to test the thermistors (temp sensors) it is hard to find technical data on these fridges. I needed to test the thermistors resistance @ a certian temperature to ensure they were working properly but where do u get such data? I also wanted to know some information about the logic programmed into the board (i.e when do you initiate defrost etc. . .). I had no such luck so i figured since i tested the defrost heater and thermostat and they were ok and all of the evap fans and such were working i'd order a circuit board and new thermistors. Got the CORRECT PARTS from this site in 2 business days and my fridge is working great! changing the parts was really easy, figuring out which parts to change was the only difficult thing about this job.

Followed the repair video, was spot on!!

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.

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

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.

followed part select video instructions

What an awesome site! After putting in my model number and finding the problem I was having, I simply picked the 2 parts that were most likely to solve the problem. I bought a defrost thermostat, and defrost heater. To a high certainty, they would solve my problem. They didn't however! I ended up having to buy a temperature sensor on another order a few weeks later when the problem resurfaced! My own fault. I should have bought it the first time. As others have written: the longest part of the job is defrosting the ice from the coil. One thing I did that I didn't see suggested: plug the drain hole below the coil. I put a couple towels in the bottom of the freezer and ran the hair dryer. Didn't take long. I read that the amount of water created will overflow the pan under the refrigerator, so I plugged the drain hole. Once you clean that mess up, the repair is pretty straight forward. Great site. Even through I had to make two separate purchases, I still saved a lot of money. Thanks!

I can't tell you how luck I feel after finding your website I ordered the temperature sensor after watching one of your videos on-line and the repair went just as on the video. I pulled the "bad" sensor out, and replaced it with the new one. Keep in mind that this is the first time I ever touch an appliance, needless to say I'm feeling pretty good about that! All in all it took me about 20 minutes to complete my repair and it now has been about 4 days and the refrigerator is working like new again!

replace sensor in refriger.

Remove the shelves then remove the back by removing the two screws at the top of the panel. Locate the temperature sensor on top of the coil. Cut the wires and replace with the new one. Use wire nuts and electrical tape to reconnect the wires.

exactly as the instructions.......never did see anything about replacing the adapter...therefore i did not

Unplugged the refrigerator first....then on the inside of the fridge, I popped the temp sensor cover off (upper LH side) and exposed the old sensor. I snipped off the old sensor about 3" down from the end and connected the new sensor (which I trimmed down to about 3" long) with some heat shrink wire nuts/connectors. Let the fridge run for a day or so and confirmed the problem was solved! Oh yeah, there was no way to tell the 2 wires apart (power vs. ground) on the sensor. However there was a manufacturer's stamp on the wires. So note the orientation of the text and mark one of the wires with a sharpie on both the old and new sensor before trimming. This will give you a reference for which wires to connect when adding the new sensor to the old wires.

The repair is a snap, you can watch the video and it will put you on the right path. My story is more about the service that Part Select gave me. I used a small box fan on low as a temporary fix. My model number was worn off from the box wine we store in that particular place. So I ordered the part based on looks, well it was wrong. Called Part Select and we talked, the nice lady on the other end said OH it must be this fan motor. Send us back that one, and I'll get this out too you. I'll credit your account for $7.99, and it cost me $8.99 to ship back the wrong part. Wow, the next day I received the new motor. They sent it overnight! I thought it would be 5-6 days! Unbelievable. I will use this company for any, and all my repairs.

It was easy and fast, like changing a light bulb. The directions were clear and easy to follow. Thank you.

Easy, with included video and instructions