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Old 02-27-2014, 03:33 PM   #1
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Default Heating AC system problem 99 Lesabre

Rattle when AC starts - related to fan speed - disappears at higher speed. But possibly related to slow conversion to redirection of air to coming through the Dash ducts. Recently in cold weather (-20 F) there are brief episodes of warm air stopping (air directed to floor and to windshield usually at that outside temp.
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Old 02-28-2014, 10:06 PM   #2
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The rattle takes place only at low speeds? In all, or one or more mode positions....

Could be a broken squirrel cage, is out of balance(debris), etc.
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