This Federalsburg, MD homeowner said it seemed like their HVAC ran CONSTANTLY! During a no-cost, no-obligation inspection by one of our Home Comfort Specialists they found that a main flex duct had become unattached from the collar on the trunk duct. Even though "duct" tape is great for a lot of different things it actually is not recommended for duct work. The constant change in temperature either within the duct work or even in the surrounding room the duct is placed in causes changes in the tacky, tape side. It eventually loses it's ability to hold and stick to other products.