Lennox furnace error code 201

This error code is classified as an “Input/Output” error. This means that the furnace cannot communicate with the board. The most common causes of this error are boards that are not connected to the furnace, do not have power, and lost wires between the board and furnace.

If you have a Lennox furnace and receive this error, it could be due to various things. The first thing you should do is check for unusual noises coming from your furnace. If it shows no signs of being in use or has unusual sounds, your control board may not be working correctly.

Lennox is a major furnace producer that produces some of the most efficient furnaces in the world.

This article will help you identify this specific error code and provide steps to fix it.

Below are the steps you need to take when encountering Lennox furnace error code 201:

– Turn off power to the furnace and ensure no light bulbs, electronics or other appliances are plugged into the same circuit as your furnace.

– Make sure that any breakers are turned off or flipped to the OFF position (not LOCKED)

– Press the RESET button on your thermostat with a pen or pencil (not a key). If this doesn’t work, turn off the power to the furnace, then turn it back on.

Some common reasons for code 201 could be a bad power connection, a power outage, or even a wire disconnected from the top coil.

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