Furnace Control Board Problems

I hope the youtube video below will help you troubleshoot your furnace s control board.

Furnace control board problems.

If the furnace s draft inducer will not start or if the blower motor will not start then this could very well be a control board problem. Tapping on the relay can sometimes help but only delays the inevitable failure of the board. When an electro mechanical switch like the ones on our boards is suddenly being used after a long period of downtime like the end of one winter to start of the next winter it can become permanently stuck. Here are signs you may have a malfunctioning furnace control board.

Interruption of the regular sequence of events. Debris and dust can cause the air filters to clog. It is on the weekend when getting a control board is impossible or the person does not want to wait on a new control board to be shipped in before they can use their air conditioner. It is hot and they need air conditioning now.

If you have an electric furnace some causes of circuit board failure may include the following. After a certain period of time the furnace wires will become loose due to the vibration.