"HP" error on heat/AC unit

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View attachment 95846

I found this online. Looks like it’s in port aft corner of the cabin.

thank you. I will maybe start there with opening it up

 

[RVM]

Final Verdict...... found the unit (under the front bed). The filter was completely clogged, having never been cared for by the previous owner. Works great now. Thanks everyone. This forum is GREAT!