Replacement AC for Dometic 640315C751J0
Updated 11/17/2025 | Published 12/03/2024
Question:
Hi, I am looking to replace my dometic ac unit. We have a dometic model 640315C751J0. I understand it is a 13500 btu ac with heat with manual control non ducted and low profile in black. I would like to replace it with low profile black 15000 btu ac only and hoping not to have to change to roof cutout. What would you recommend and do I need to change the inside unit as well. Trying to be as economical as possible and keeping it simple so I can do it myself. Many thanks
asked by: Rod H
Expert Reply:
Hi Rod; for a simple plug and play low profile replacement for your Dometic setup you can use the Dometic Penguin II High Capacity RV Air Conditioner w/ Heat Pump # DMC33ZR. This is designed to replace units with the manual air distribution box like yours and will not require replacing the inside unit.
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Robin H.
11/17/2025
Hey Rod, how did the swap to the Dometic Penguin II work out for your setup? It sounds like it should have been a straightforward fit with your existing inside unit. Sharing how it went could help others planning a similar upgrade.