Jessgrand for Model Number LG LMX25964ST/01 Purchased unit 2011. Technician replaced the original compressor FC75LBNA 60mhz with FLB075LANA 53mhz and also replaced the capacitor from 18mfd to 10mfd. After the repair, the temperature average fridge/freezer to 40/20F(fahrenheit). Later, technician added freon and temperature averaged 36/15F. Freezer never reached zero F or lower. Default settings 33/minus 6F. Also, there was ice build up on the copper tubing between the compressor and evaporator and after about 8-10 hours ON, unit defrost stays OFF for about an hour, temperature goes up 40/27F, then turns ON again for 8+hours then defrost, getting the same temperature averages. I am happy with the fridge temperature but not the freezer. That's the cycle. The condenser coils cleaned, both condenser fan and freezer fan running and even applied petroleum jelly to door gaskets to keep a good seal. I suspect the freezer temperature sensor that is causing the freezer not getting the zero or less temperature. I do appreciate it very much for your help. Thank you.
Answer Jessgrand, if the compressor is operating the entire time that the unit is not in defrost and the freezer is not reaching proper temperatures, more than likely there is a freon issue. The compressor should not run the full 8 hours unless either there is a frost build up on the evaporator or not enough freon passing through the evaporator. Based on the information provided, it sounds like it would be the freon, the tubing running from the compressor to the evaporator should not have a frost build-up. Read More... Answered by AppliancePartsPros.com | Monday, March 16, 2020