Part Location Diagram of 4387121 Whirlpool POST-DAMPR
See part 9 in the diagram
( Grid squares measure 1x1 inch )
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POST-DAMPR 4387121

 Fits your K2TREFFWBL00 Refrigerator!
$ 29.53
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 Fits your K2TREFFWBL00 Refrigerator!
PartSelect Number PS370936
Manufacturer Part Number 4387121
Manufactured by Whirlpool
Troubleshooting
This part works with the following products:
Refrigerator.
This part works with the following products:
Whirlpool, Kenmore, KitchenAid, Roper.
Part# 4387121 replaces these:
AP2990695, 585879, 2163809, 2172570, 2179858, 2179859, 2195603, 4387121
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Questions and Answers

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3 questions answered by our experts.
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Carl
April 7, 2018
The freezer works fine but the fridge part will only get to about 45 degrees what would be causing this problem? Thanks
For model number Er2chmxpl02
PartSelect logo
Hello Carl, Thank you for your inquiry. We would recommend checking the following parts to fix your issue: post-damper control assembly, temperature control thermostat assembly, defrost timer, defrost thermostat, cycling thermostat, evaporator fan motor. You can test the parts with a multimeter. Hope this helps!

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Carl
April 8, 2018
I checked everything you listed seem like they are all working, would one blade broke off of fan in freezer department cause my problem it will only cool to 44 in fridge. I can feel just a little bit of air coming out of vents from freezer to fridge . Or is there anything else i can check, thanks
For model number Er2chmxpl02
PartSelect logo
Hi Carl, Thank you for your question. It could be the cause. If the fan blades are broken then you would probably need to replace the part. The only other thing that I could think of would be your electronic board causing the issue. I hope that helps. Good luck with your repair.

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Shangjun
February 22, 2020
The frige is too cold (0 ?) if i want to let the freezer keep at aroud -18 ?
For model number ER2CHMXPL04
PartSelect logo
Good Day Shangjun. Thank you for your question in regards to your unit (Model Number ER2CHMXPL04). Based on our research, you may need to replace the Thermostat Assembly (PartSelect Number PS11739539) in order to solve the issue that you are having. You can order this part either online at our website www.PartSelect.com or by calling us by phone at 888-260-4310. Best Regards.

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Model Cross Reference
This part works with the following models:
PartSelect Number: PS370936
Manufacturer Part Number: 4387121
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