Intellitec 00-00591-200 Master Control Unit (heat-a/c) prob

I'm an RV tech here in Florida not far from you. I'm dealing with a master controller issue right now in our Fleetwood Pace Arrow, and it is the same one you have. I've been checking voltage and ohms for hours now and I'm sure the controller needs to be replaced. I'm going to go ahead and replace my ECC thermostat as well since it's also pretty old. Let me know if you need a mobile tech, I have fresh experience in this area unfortunately lol.