How to Check for a Central Air Leak

Central air leaks can be a real problem for homeowners. They can damage the integrity of a home, and homeowners end up paying large electric bills for air conditioning they are not fully receiving. This is why it is essential to check for central air leaks every six months. Catching leaks early can save time, work, and money.

Metal straps
Mastic paste

Instructions

- 1
  Check for kinked ducts and all ducts that run through crawl spaces, attics, and garages.
- 2
  Check all insulated ducts to see if they have streaks of dirt around the seal. If they do, it usually means you have a leak.
- 3
  Check for air leaks around joints where duct work meets heating or cooling units. Also, check around the plenum and areas where ducts split. If you have a leak, you will usually see open spaces and cracks.
- 4
  Secure metal duct straps every 5 feet in areas that have flexible ducts. Sometimes installers do not secure every 5 feet and it usually leads to ducts sagging, detaching, and eventually, leaks.
- 5
  Apply mastic paste around joints, collars and corners of the entire air or heating system. This will seal the system and help prevent leaks.

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