What is the job of a furnace circuit board?

Answer by  Sparky101 (366)

The furnace circuit board controls the fan, heating elements or air conditioning condensing unit if applicable. It also provides the low voltage power source for the thermostat as well as receiving control input from the thermostat. Without this circuit board the system will not function properly and will require servicing.

Answer by  HJ (143)

Newer furnaces, like many new appliances, are almost entirely computer controlled. The circuit board takes information from various sensors and switches (not the least of which is your thermostat) and uses the information to decide when the furnace should kick in (and is safe to do so)

Answer by  kennethjgoodson (4903)

The job of the circuit board has the main job of turning the heat on when the thermostat is reading at a lower temperature than what it is set at. It is just like a tv or computer and that is its main function is to turn on and off.

Answer by  Liz59 (10966)

The function of the circuit board is to link all circuits together so that they are amplified correctly. A circuit board can hold multiple circuits depending on how big the board is.

Answer by  Liz59 (10966)

Well the job of the furnace circuit board is to provide electricity in the whole house and provide heating as well.

Answer by  MikeMcStudly (35)

The furnace circuit board tells the furnace when to turn on and off and maintains the furnace's temperature. Without a furnace circuit board, the furnace would not be able to turn off when it is hot enough.

Answer by  choctaw (361)

The purpose of the circuit board is to control the furnace. The circuit board causes the furnance to turn on and off as the settings dictate on your home cantrol panel. If your furnace wont turn on or if the home is not as warm as it should be it is usually caused by a short in the circuit board.