Hi all,

I caught a mouse inside my home and was looking to seal openings outside.
Looks like where my line set, power and control line is coming out has a big gap. It goes up about 4 inches
behind the deck board as well. I also feel cold air coming out around the opening!

Would expanding foam be OK to apply here? I have some duct seal compound as well, it looks like that may be hard to work with in there.

Here is a photo:

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I see an extra pad, the cut lines and old mounts for a service disconnect as well. Living in a condo, I guess the unit below me
originally had their condensing unit next to mine before relocating it to the back of the home.

I appreciate any advice. I will call a pro if need be. Thanks!