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Hi I have a GE profile PFS22MBS refrigerator which had been experiencing wide temperature fluctuations for a couple of weeks.

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Old 06-17-2011, 04:30 AM
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Default GE Profile Refrigerator Problems
Model Number: PFS22MBS   Brand: GE   Age: 1 - 5 years   

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Hi I have a GE profile PFS22MBS refrigerator which had been experiencing wide temperature fluctuations for a couple of weeks. On Tues the top fridge compartment went up to 74 and the freezer to 24. The fan was not running. I replaced the control board and the fan now runs and the freezer is down to 15 indicated - zero by thermometer at the very bottom - but the top fridge is still at 74. Any ideas what to do next? Besides go shopping, I mean I don' have a schematic or parts diagram.


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  #2 (permalink)  
Old 06-17-2011, 05:04 AM
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Quote:
Originally Posted by BYmechanic View Post
Hi I have a GE profile PFS22MBS refrigerator which had been experiencing wide temperature fluctuations for a couple of weeks. On Tues the top fridge compartment went up to 74 and the freezer to 24. The fan was not running. I replaced the control board and the fan now runs and the freezer is down to 15 indicated - zero by thermometer at the very bottom - but the top fridge is still at 74. Any ideas what to do next? Besides go shopping, I mean I don' have a schematic or parts diagram.
update - evaporator fan not running. don't know why
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Old 06-17-2011, 11:28 AM
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For problems like an evaporator motor not running, I always recommend (for the motherboard refrigerators) to replace the motor AP3855880 and the motherboard at the same time. A bad fan motor will blow out the driver on the motherboard, so now you need to replace both items!
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Old 06-17-2011, 12:46 PM
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Hi - I agree in hindsight. However, the motor has 1646 ohms w to r so its not shorted. No burned resistors on the old or new board. I applied 12v and it did nothing.
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Old 06-17-2011, 02:41 PM
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Check the voltage to the evaporator fan motor as described in one of our previous threads: GE refrigerators (GS* & PS* models), the evaporator fan motor test and replacement.

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Old 06-23-2011, 10:06 AM
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OK - I checked the voltages and got 12V or so on red-white but nothing on yellow-white. I connected the motor wires to a 12V source (yellow & red to +, white to -) and it ran. The board is new and the motor was not shorted so unless the board was defective when I got it then it should be ok - right? I found a good document on GE Electronic Refrigerator Diagnostics but it does not describe the logic used by the board to control fans so I'm not sure where to look next - tonight I plan to check the thermisters. Any more sage advice would be appreciated.

Ross

PS I bought a new fridge so the pressure's off. I did run it for a few days by putting a small fan in place of the ev fan running continuously
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Old 06-23-2011, 02:57 PM
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Ross,

It would not surprise me if the new control board is defective. Try to exchange it under the part warranty.

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Old 06-25-2011, 03:53 AM
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Quote:
Originally Posted by Gene View Post
Ross,

It would not surprise me if the new control board is defective. Try to exchange it under the part warranty.

Gene.
Thanks for all your help Gene. I checked thermisters & then put the fan motor back in and it's working perfectly. I'm guessing that there was a bad connection - the pins looked a bit corroded.

For anyone with similar problems here is a link to some good info: http://www.geservicenet.com/cc/trngp...iagnostics.pdf
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