There are several different types of HVAC circuit boards, each with its own specific functions and features. Some common types of HVAC circuit boards include control boards, relay boards, and user interface boards. Control boards are the main circuit boards in an HVAC system, and they are responsible for controlling and coordinating the operation of the various components, such as the thermostat, the furnace, and the air conditioner. Relay boards are used to switch electrical signals and power on and off, and they are typically used to control large loads, such as motors and compressors. User interface boards, also known as display boards, are used to provide information and control options to the user, such as temperature settings and system status.
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