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Troubleshoot Noises From Central Air Conditioner

central air conditioning units are commonly type dual unit system. This means that compressor and condensing unit are outside house. portion of central air handler air, however, is on inside, either in attic or closet dedicated.

air handler consists evaporator coil, blower plenum air and fan and motor. air handler is usually source of noise heard from air conditioner. If you hear whistle from unit, examine vents, or records, loose parts or screws.

Troubleshoot Noises From Central Air Conditioner

whistling noise indicates that air is escaping through crack or seam in ductwork before it reaches discharge vents. Tighten register screws with screwdriver. Use duct tape to seal off suspected cracks, holes or seams in ductwork to quiet or eliminate noise.

Turn thermostat off to prevent unit from turning on while you are working around air-handler. Switch off circuit-breaker to air conditioner. circuit-breaker is three-pole breaker located in main lighting panel.

breaker should be labeled as either air-handler or air conditioner. Remove air-handler cover from main unit. Machine screws hold cover in place.

flathead or Phillips-head screwdriver is necessary for backing out screws and removing cover.

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How to Troubleshoot Noises From Central Air Conditioner