08/08/2026
Headline: Upgrading your Penguin II AC? Here is how to keep your original thermostat. Replacing a discontinued Dometic Penguin II with the newer FreshJet 5 can often cause communication errors with your RV’s existing thermostat layout. To solve this, our team performs a custom installation by retrofitting your original Penguin II electronics directly into the new FreshJet 5 unit. This allows the new, quieter air conditioner to seamlessly integrate with your current system without losing multi-zone functionality or requiring a complete network overhaul. You get the benefits of a modern AC while keeping your interior controls exactly as they are.