I have a 2019 3130re.
This is my front unit. I took pictures of the numbers while installing a SoftStartRV.
I'm don't know if the rear unit is different. The front is AC the rear is a heat pump.
I haven't taken the cover off the rear one to see.
Dometic air conditioner part number, front H541916A721JD
SKU. 9105305954 **
15000 BTU
https://www.dometic.com/en-us/outdoo...-nxt-15k-28977