Question about Refrigerators
I wrote 2 weeks ago re fridge buzzing noise - every 3 minutes buzzes for about 6 seconds then stops with a click. Replacing relay switch worked temporarily but it has started again! Fridge runs properly for about 8 hours then buzzing starts on & off for about 1/2 hour. When the original switch was checked at the shop, it was found to be okay. Any other suggestions?
I note this is a very old post. The compressor is not starting and what you were hearing was the PTC relay energizing followed by the KilXon thermal overload kicking off the compressor start sequence. What happens is that the PTC relays sometimes get a heated contact. Due to the weakened state of the contact it can cause a buzz. Even with a goo PTC relay you would hear the compressor buzz if it was not starting. In that case the run capacitor may have failed or the compresor rotor is internally locked at which point the start cycle will repeat every 3 to 4 minutes as the thermal overload cycles and the compressor will not start.
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Posted on Sep 03, 2010
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Posted on Jan 02, 2017
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