u/MountainsMama

Hi there. My basement is very old and my furnace is relatively new ~5 years old. I noticed this weekend that settling has happened and now there is a gap above the first main piece of the furnace nearest the floor and the next component. I’m not familiar with hvac terminology. Air blows out of this gap and I can see that it was sealed at one point. Is this something I can fix myself with duct tape or should I get a furnace tech out to level the system and seal the gap again?

Edit #1 - Thanks for all of these responses! Very helpful. What I’ve realized now that I’ve thought through it more is I know what the cause is after all. We had the main floor joist raised and added additional posts a few months ago to level out the main floor. Obviously that raised all of the duct work and lifted the furnace causing this issue. I didn’t notice at the time and neither did the contractor. I think you all are right that I need to shim it up so that the gap closes then use hvac tape to seal it back up.

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