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.
UPDATE
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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No icemaker for me either, same problem. Any help would be appreciated.
crwdns2934271:0crwdnd2934271:0 Ryan Johnson crwdne2934271:0
I have a split fridge and the freezer part is hissing and I don't hear it running but it's ice cold why is it hissing
crwdns2934271:0crwdnd2934271:0 Ronnie Steele crwdne2934271:0