This is a quick summary of the instructions that came with the control board we replaced off a 2018 Dometic Heat Pump and Air conditioner - Penguin II. If you have one broken out of two air conditioners, and you have a 5-button thermostat, new A/C's all come with 12-button boards. SO, you'll need to swap out the board to a 5-button board.
Recommend doing this yourself - pretty easy. Happy to answer questions if you need to ask, just post in the comments section.

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