36Normal operating sounds.1HZHUUHIULJHUDWRUVVRXQGGLȺHUHQWIURPROGHUrefrigerators. Modern refrigerators have more featuresand use newer technology.HUMMM...WHOOSH... 7KHQHZKLJKHȻFLHQF\FRPSUHVVRUPD\UXQIDVWHUand longer than your old refrigerator and you mayhear a high-pitched hum or pulsating sound whileit is operating. Sometimes the refrigerator runs for an extended period,especially when the doors are opened frequently. Thismeans that the Frost Guard ™ feature is working toprevent freezer burn and improve food preservation. You may hear a whooshing sound when the doors close.This is due to pressure equalizing within the refrigerator. You may hear the fans spinning at high speeds.7KLVKDSSHQVZKHQWKHUHIULJHUDWRULV¿UVWSOXJJHGLQwhen the doors are opened frequently or when a largeamount of food is added to the refrigerator or freezercompartments. The fans are helping to maintain thecorrect temperatures. If either door is open for over 3 minutes, you may hearthe fans come on in order to cool the light bulbs. The fans change speeds in order to provide optimalcooling and energy savings. You may hear the fans running after selectingQuickFreeze ™ or one of the CustomCool™ settings.CLICKS, POPS,CRACKS and CHIRPS You may hear cracking or popping sounds whenWKHUHIULJHUDWRULV¿UVWSOXJJHGLQ7KLVKDSSHQVDVthe refrigerator cools to the correct temperature. Electronic dampers click open and closed to provideoptimal cooling and energy savings. The compressor may cause a clicking or chirpingsound when attempting to restart (this could takeup to 5 minutes). The electronic control board may cause a clickingsound when relays activate to control refrigeratorcomponents. Expansion and contraction of cooling coils during andafter defrost can cause a cracking or popping sound. On models with an icemaker, after an icemaking cycle,you may hear the ice cubes dropping into the icebucket.WATER SOUNDS 7KHÀRZRIUHIULJHUDQWWKURXJKWKHIUHH]HUFRROLQJFRLOVmay make a gurgling noise like boiling water. Water dropping on the defrost heater can cause asizzling, popping or buzzing sound during the defrostcycle. A water dripping noise may occur during the defrostF\FOHDVLFHPHOWVIURPWKHHYDSRUDWRUDQGÀRZVLQWRthe drain pan. Closing the door may cause a gurgling sound due topressure equalization.Do you hear what I hear? These sounds are normal.For additional information on normalicemaker and dispenser operating sounds,see the About the automatic icemakerand About the ice and water dispensersections.