Ge refer model psc25mstass fresh food section not cold enough freezer cooling fine
I realize this is an old post but information is always helpful if it is correct. I have a GE Model TFX22ZRB, Main tools needed are a refridgerator thermometer, a cheap multimeter, 1/4" hex driver, phillip screwdriver and regular blade scewdriver, above all, alow time for tempeture change when measuring tempeture. The freezer is running at -8 degrees C or aproximately 28 degrees F. I don't care about 1 or 2 degrees at this point in the freezer, the defrost system is working ok, The freezer is cold enough. The fresh food section is running at 48 degrees F, the damper is wide open between the freezer and cold food section, I manually removed the damper door and controls since I am only interested in seeing if I can drive the fresh food section colder. Looks like the fresh food thermostate controls the compressor and not the damper to shut off the cooling process when the tempeture gets cold enough. Since the fresh food section does not get cold enough (this should be in the uppers 30s F) there is no need to move the fresh food thermostate out of the normal range setting (mid point in my case) with the operator control. Defrost heaters ok, this unit uses 2 heaters hooked in series with a evaporator coil thermostate also in series with the heaters. Heaters aproximately 25 ohms total risistance, coil thermostate open at room temp and closed when below 32 degrees. Only other item in circuit is the defrost timer, this can be manually advance to open and close the defrost circuit, in my case, when in the defrost mode, the evaporator fan stops and the heaters heat up. The defrost timer in my case has a 12-16 hour cycle time and a 30 min defrost time, so in a 24 hour period I may get only one defrost cycle. One item of importance. make sure something has not fallen in the lower back or the fresh food section of the refridgerator to block the air flow return, this will effect the coo;ing process. Now with the damper wide open, the defrost circuit working ok I am going to look at the evaporator fan itself for speed, shifted blades or the air circulation between the freezer and the fresh food section, I have cleaned the condenser coils but I am leaving the condensor and compressor out of the equation since the freezer is cold enough but at this point I am considering the possibility, I may need to replace the fridge if the compressor is not working to par.
Jul 18, 2012 |