Your indoor unit, also called an evaporator, has a number of electronic and mechanical components that are imperative for it to operate properly. One of the most important of these, is the control board, or main "PCB" (Printed Circuit Board). The main PCB is the 'brain' of the unit, and controls it's different components and features. It takes measurements through a serious of sensors, makes decisions based on the ambient conditions, and adjusts the operation of the unit to best suit your needs. Here, you will find a selection of boards to meet your needs. If you can't find what you are looking for listed, feel free to reach out to us and we will do a parts search to get you back up and running as quickly as possible.