Jim for Model Number 106.9550781 Over a period of 18 months, I have replaced: cold control, defrost timer, defrost thermostat, verified defrost element was working over this time span. (yes, I thoroughly cleaned condenser coils and verified condenser fan and evaporator fan working.) After each of the above, it would work and hold correct temps for several weeks, then warm up. Turning off for an hour and back on and it would be fine. A temp recorder verified temps were holding over 4-5 days and also showed short term spike in temp during defrost cycle every 10 to 12 hrs. I finally, realized evaporator coils were only frosty a couple inches from the bottom. I installed a vampire tap and added 1/2 can of R-134-A freon. Following additon of freon, evaporator coils became uniformly frosty. I installed a plexiglass "window" in the tin cover in back of freezer. This allowed me to routinely "see" evaporator coils and confirm uniformly frosty. Temps held (verified with temp recorder) for more than a month during hot July and August. Then it failed again. Turning off for 1/2 hr and back on, it started working and continues now for a week. Could the overload relay be the problem and only fail intermittently? Through all of this, we avoided food spoilage due to a spare refrigerator in the basement. Although it is ugly green color, it has never even burped in 36 yrs and condenser coils have gone for many years without cleaning. For 18 yrs, this green machine was in the same location as the present Kenmore before be relegated to the basement.
Answer Jim, if you add R134A to a R-12 system it will contaminate the freon and it will not run properly. A start device on a compressor can fail but the compressor will not run if it fails and it would have to be replaced. Read More... Answered by AppliancePartsPros.com | Tuesday, September 4, 2018