Issue with my refrig: Frost on back of Freezer. No air (cool or otherwise) really coming through to the food side unless Freezer is really cold, but then only makes the Frost thicker. Is it the motherboard or the heater or the thermostat that I should replace?
You can check the defrost limiter to see if it has continuity. If it does not have continuity then you would not need to change it out. You will also want to check the defrost thermistor for resistance. The resistance values should be as follows, 42.5K at 0 degrees, 14.4k at 37 degrees and 5K ohms at 77 degrees. If not within range then it would need to be replaced. If it checks good then also check the defrost heater for continuity. If no continuity then replace and if good with continuity and all other components check ok then you would need a new main control board. You can test this with a multi-meter TJMA-DMT3. Here is a link on how to use a multi-meter. http://forum.appliancepartspros.com/oven-repair-including-ranges-cooktops/4810-how-check-continuity-ohmmeter.html
How do I install a single defrost heater element with a dual element heater?
You would install the heater the same way as the original heater by screwing to the bracket. What changes is where the wire on the left side goes. The kit comes with a yellow wire that if the original blue wire is too short you can cut the connector off and splice the yellow wire to it to make it longer. This will allow the wire to go across where the other wire comes down the right side of the evaporator and connect to the element. You can connect either wire to the terminals and there is a jumper on the other end of the heater connecting them together.
The refrigerator door (side by side) was left open for 17 hours. After closing door and checking temp, it read 94 degrees. After running for several hours the refrigerator side read 63 (coldest) and the freezer side read 22 (coldest). Thinking the coil had froze up, I unplugged for a 2 hours and plugged back in, same temp results. Appliance repair man came out and said it needed freon, but recommended buying new unit, once there is a leak, nothing you can do. Odd that is was working fine prior to this. After visiting your site it sounds like it might be a Defrost Heater first, then some other options. Am I on the right track? Could it have burned out the Defrost Heater or is it something major like the Main Control Board? Thank you for your help and your wonderful website. Stephen
Answer Hello Stephen,
Leaving the door open will not cause a Freon leak. It also will not cause the defrost heater to burn out. It will however, cause the unit to be hot and will cause a frost build-up on the evaporator coils. You should re3move the back freezer wall and check for an ice build-up. The defrost cycle will never be able to remove the frost build-up caused by this so you will need to defrost the unit with a hair dryer. Plug the unit back in and let it run for 24 hours. If the temperature has not returned to proper levels it will be time to diagnose the issue starting with the fans and compressor, (running or not?). If there was a considerable build-up, defrosting should take care of the issue.