ZISS420NNBSS General Electric Refrigerator - Instructions

There were only 3parts listed to check omed out the defrost heater and thermostat ....thermistor checked bad ordered replacement took less than 2 minutes to replace after I defrosted it again runs fine

unscrew filter and replace the new one

We received the part just a few days after ordering, unscrewed the old filter by hand, and installed the new filter the same way.

Removed water filter and inserted plug (works great and water flow increased)

Folowed instructions

I just unscrewed filter and screwed in filter bypass

none required

Just removed the filter and used my hand to attach the water filter bypass cap....did not even need to turn off the water first.

Very simple, I followed instructions sent with the filter. Twisted old filter clockwise 1/4 turn to remove. Filled new filter with water, lined up arrow on filter to arrow on refrigerator, and then turned 1/4 turn counterclockwise. Filter raised and seated itself. Wiped few drops of water from refrigerator shelf.

Removed the old filter. Filled the new one with water and put it in theplace of an old one. Flushed the system with 1 gallon of water.

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.

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 ;).

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

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.