Whistling Double Door

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  #1  
Old 03-17-16, 03:03 PM
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Whistling Double Door

After repainting the double doors to my apartment utility closet, they now emit a loud whistling noise when the circulating fan inside the closet cycles on. The sound seems to come from the crack at the top two feet or so where the doors meet. Should I sand down the paint a little where the doors meet?
 
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Old 03-17-16, 04:30 PM
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Before you do all that, cover the space with a piece of painter's tape. See if the whistling stops.
 
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Old 03-17-16, 04:34 PM
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Need more info.
Where's that fan getting it's make up air?
Is there a vent in the door?
 
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Old 03-18-16, 02:34 AM
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How close is the bottom of the doors to the floor?
 
  #5  
Old 03-18-16, 06:43 AM
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The 8’ x 3’ x 8’ closet houses the water heater and a large Carrier water-sourced heat pump that services a 1,900 sq. ft. condo unit whose primary return air vent is six inches off the floor in the 3-foot wall, not in the double doors hung in one of the 8-foot walls.

There is a one-half inch clearance between the doors and the granite floor, whose tiles extend just beneath the doors. The margins at the tops and sides of the doors is reasonably tight, although there is about -inch of play between the doors and their frame in the middle. Despite the large (25” x 22”) return air vent, when the powerful fan inside the heat pump cycles on, it sucks the doors against the weather stripping, tacked to the inside of door frame.

I covered the margins with painters tape per Pulpo’s suggestion. This revealed that the whistling is taking place at the top of the right hand door, between 5” and 15” to the right of where the doors meet.

For 30 years there was no whistling. The whistling started after the new paint job.
 
  #6  
Old 03-18-16, 07:09 AM
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If you painted edges of the doors, it lessened the space between them. That's probably what caused the whistle. Tighten the hinges & spin the pins. That might help restore the space. The doors may have shifted by now.
 
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