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02-04-2005, 03:43 PM #1
After the blower is on for a few minutes there is a vibration type noise that lasts for approx 20 seconds then goes away. They had thought it was the new type of filter (pleated-90 day) they were using & decided to change back to they original type (fiberglass). The noise stopped for a while with the original type filter but then came back.