Lennox furnace error code yellow

This error code is a temperature sensor issue or a sensor problem. To fix it, you need to replace the control board or the controller with a new one.

The Lennox furnace error code yellow is caused when the temperature sensor on the control board is not reading properly, and this causes the system to turn off prematurely.

Lennox furnace error code yellow message about sensors.

Lennox furnace error code yellow results from a malfunction in your furnace. This may mean that you need to replace your furnace’s control board.

Lennox Furnace Error Code Yellow can be caused by various problems, including low voltage, shorted wires, loose wires, worn-out fan blades and blower motor issues.

The Lennox furnace error code yellow is a condition that occurs when the flame sensor on the furnace is giving off an error code yellow. Many factors can cause this to happen.

1. The exhaust fan motor has failed, so the furnace cannot supply adequate fresh air to the unit.

2. The ducts have iced over, or insufficient fresh air is passing through them.

3. There may be a clog in the combustion pipes (elevator shaft).

4. The pilot light needs to be replaced