ChuckSteed wrote:
Yes... Dometic makes a cable for its air conditioner control module CANBUS...
https://www.dyersonline.com/dometic-a-c-18ft-communication-cable.html
It sounds to me like either you have an issue with comm cable running between the two units or one of the control modules is not compatible with the other and it’s control module box isn’t seeing the data across the comm cable being sent from the thermostat
That's what I thought. But he confirmed he replaced BOTH AC units and they had 10 button control boards. Doug