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GE Profile Fridge Coil Icing Up

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I have a GE Profile side by side. It has separate evap coils for the freezer and refrigerator side. Fridge

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Old 08-27-2018, 07:53 AM
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Default GE Profile Fridge Coil Icing Up
Model Number: PSCS5TGXCFSS   Brand: GE   Age: 1 - 5 years   

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I have a GE Profile side by side. It has separate evap coils for the freezer and refrigerator side.

Fridge side got warm. Removed the back panel in the freezer and the lower 4" of the coils were iced up. If the heater were bad I would expect more ice. It may have been in the middle of the deice cycle?

The refrigerator coils were a solid block of ice. I did not see a heater element for it. I noticed the drip pan under the coils had two holes corroded through so melt water was dripping inside the fridge compartment and keeping humidity high. I fixed the holes with aluminum tape.

Does anyone know how the fridge coils are defrosted? Could a failing freezer defroster affect the fridge side too? I would not think so.

Another poster said they replaced the temp sensor on the fridge coils to solve their problem, but there was no long term followup to post the results. I saw the wiring snaking down behind the coils, but didn't find the sensor. I am not sure how that would affect the ice condition since there is no heater element there.

Ideas?

Thanks!


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  #2 (permalink)  
Old 08-27-2018, 02:04 PM
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Some people on this beast just change all the thermistors.Or just start with the fresh food thermistor in the block.Do not remove the block as you will never get it tight enough on the evaporator. The fresh food does not have a defrost heater.It uses the thermistors basically to keep the fresh food evaporator above a certain temperature.This is a very good article.

Last edited by ohm : 09-13-2018 at 11:00 AM.
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Old 08-27-2018, 02:09 PM
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Prepare the replacement thermistor:
1. Fold over a piece of electrical tape onto the thermistor wire; position it half an inch away from the thermistor head. This will allow for proper positioning of the thermistor head when reinserted into the thermal block.
Mmmmmm
2. Fold over a four-inch piece of foil tape (WD49x27) onto the thermistor wire; position it behind the electrical tape. This will protect the thermistor wire from cuts and allow for the formation of a drip loop.
3. Insert the thermistor into the thermal bock until the electrical tape touches, and then bend the foil-taped wire at a downward angle to begin a drip loop beyond the edge of the evaporator.
(Evaporator removed for clarity.)
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File Type: pdf Tech-Tips-GE-Thermistor.pdf (502.3 KB, 2 views)
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Old 08-27-2018, 02:18 PM
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Page 22 talks about how the fresh food defrosts. Changing thermistors are going to be the cheapest thing if thats your problem on this refrigerator as we can only hope. Service Manual. https://drive.google.com/file/d/0B-i...ew?usp=sharing
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Old 08-27-2018, 02:35 PM
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Thank you for your replies. I did suspect the ff thermister may be the cause. I was dreading that as a reply because getting to it will be a royal PITA. I guess I will get one on order and post up the results.
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Old 09-01-2018, 08:29 PM
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Did you have time to work on this yet? I love updates!
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Old 09-01-2018, 09:27 PM
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Yes I did. Today the coils were frozen solid again. I pulled it apart and de-iced then replaced the thermister. The wiring was behind the coil mounting bracket so I had to remove the block to get to the old thermister. I believe i got it back in place correctly. Now to wait and see.

Now that I have been in there once before this time the entire job took about 30 minutes. That includes removal of bins and shelves, de-icing, replacing the thermister, etc.

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Did you have time to work on this yet? I love updates!
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Old 09-02-2018, 08:17 AM
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Let me know when you get a chance on how things are going.
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Old 09-02-2018, 11:32 AM
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I will keep an eye on it and post the results. Since it only lasted one week before icing up I should know more by next weekend.

Once again thank you for your help.
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Old 09-13-2018, 09:09 AM
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It has been nearly two weeks since I replaced the thermister behind the refrigerator coil. The coil is still ice free. I will check it frequently to be safe, but this seems to have fixed it.

Thanks again for your advice and help Ohm.
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