Hi – I recently replaced motherboard, thermostat and Frzr thermistor due to defrosting issue on my GE PSS26SGRBSS. The heater reads 23 ohms and it is defrosting properly. Everything works on the fridge, however it stays on constantly (evap & condenser fans on), except during the defrost cycle. I took thermistors’ measurements in cold ice water and they were within the 16.1K ohm range. Placed thermometer in both cabins and the readings matched what’s on the fridge display. Even though the thermistors’ resistance is within the range, could they still be bad (i.e. not communicating correctly with the motherboard)? The unit cools down to set temp, but seems to take long time. Could you please help?
J2 pins 3-8 is 13.5V, pins 3-4 is 12.58V, pins 3-5 is 11.93V
J1 pins 1-5 is 16.1K ohms, pins 2-5 is 16.2K ohms, pins 3-5 is 17.8K ohms, Fzr evap pins 4-5 is 23.7K ohms (all in ice water except for Fzr thermistor, still on frozen coil)
- Mike asked 9 years ago
Mike, I have evaluated the information above you have provided. It all seems to be normal. My next question is leaking the unit run 24 hours without opening it what are your fresh food and freezer temperatures ? You should have a freezer temperature of -5 to +8 degrees on the middle control setting. The fresh food should be at +37 to +45 degrees . If you are getting these temperatures the unit is running normal and functioning properly. Remember on the new energency efficient refrigerators the run on low voltage DC for evaporator and condenser motors and use little to no electricity. The compressor has an inverter board that runs a variable speed compressor. This compressor runs longer but uses much less electricity that its older counterpart. It is engineered to run almost 90% of the time at a very low amprege. Compressors in the old days used to start and stop every 10-15 minutes and the starting amprege was 12-15 amps, and then run at 4-6 amps. The new variable speed compressor starts at less than 3-amps and runs at .08 amps. So if you are not freezing food in the refrigerator section and the freezer is keeping good temperatures you have a functioning unit with no issues. Matt Ace technician
- AV Repair Help answered 9 years ago
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Hi Matt – Thank you for the prompt response! After 24 of hrs of operation, the temperatures are 2 & 35 degrees. I believe the compressor on this unit is a single speed GE PSS26SGRBSS, and was manufactured in 2004 (no inverter and no 3 way valve). From my observations and comparing this unit’s operation to my basement GE Arctica one, I still think there is something wrong with this unit. When reaching this temperature, the evaporator fan stays at its highest speed measuring 12.6V at J2 3-4, and it does not stop when reaching the temp set point. One would think the lower the temp in Fzr the lower the speed on the evap motor. Could the motor be damaged, due to prior bad motherboard that was sending fluctuating voltage at sometimes? I read in another post that fan motor can be “down Amping the board”, and therefore it is a bad motor. Or, could it be the thermistor in Fzr is bad even though it is within the Ohms range? I would hate replacing parts for the sake of replacement, and would greatly appreciate your/readers help in narrowing down this problem. Thanks again – Mike
- Mike answered 9 years ago
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