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Hissing sound inside Kenmore refrigerator 59669932011

We often hear sort of a "hissing" sound inside the refrigerator.

I think it has to do with the cooling system and that it is normal.

But could you explain more what it is exactly?

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No icemaker for me either, same problem. Any help would be appreciated.


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Water Inlet Valve

If the refrigerator is noisy or loud, particularly when the ice maker is filling, the water inlet valve is at fault. Replace it.


A cracking or popping sound can be heard when evaporator coils on Top Mount No Frost models are cooling after defrost. Buzzing noises can be heard after getting water from the door dispenser. ... The noise could last for 3 to 5 minutes. A hissing, sizzling, buzzing, or arching noise may be heard on self-defrost models.

The sound of hissing in a refrigerator is caused by the activation of something called a thermostatic expansion valve.  If coolant was constantly flowing through the copper coils in the rear of the fridge it would get too cold and you'd both waste power and everything inside would freeze.  So to maintain the proper temperature there is a valve which only allows coolant through at the appropriate times.  The valve itself does this by using the same basic principle as a thermometer.  That is, when a substance gets cold it contracts and when it gets hot it expands.  So when the fluid in the valve gets warm enough the fluid in it expands slightly and just barely unblocks the port allowing a small amount of coolant to hiss out.  Then when it gets cold again the valve closes maintaining the refrigerators temperature.

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We have no ice maker. The fridge is not noisy or loud, it is just that we wanted to know where this "hissing" noise was coming from. We heard it had to do with the cooling system or the defrosting...


I have the same problem. Did you ever figure out the cause of the hissing sound?


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Normand Choquette zal eeuwig dankbaar zijn.

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