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    maria2day Posts: 94, Reputation: 1
    Junior Member

    Feb 2, 2010, 09:46 PM
    High pitch whistling noise from central heater
    I have central heating and air. The unit is on the roof. When the heater is running it makes a high pitched whistling noise. Other than that, the heater works great. Any ideas? Can I fix it myself or do I need to call a repair man?

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