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Lennox error 147

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Lennox error 147

Lennox error 147 is a common issue that occurs in Lennox furnaces. This error code indicates a problem with the furnace’s flame sensor. The flame sensor is responsible for detecting the presence of a flame in the furnace. If it fails to detect a flame, the furnace will shut down to prevent a potential safety hazard.
 
To troubleshoot Lennox error 147, start by checking the flame sensor. It may be dirty or covered in debris, preventing it from detecting the flame properly. Clean the sensor with a soft cloth or brush to remove any build-up. If the sensor is damaged, it may need to be replaced.
 
Another possible cause of Lennox error 147 is a faulty control board. If the control board is not sending the correct signals to the flame sensor, it may not be able to detect the flame. In this case, you may need to replace the control board.
 
If you are uncomfortable troubleshooting your furnace independently, contacting a professional HVAC technician is always best. They can diagnose and repair the issue quickly and safely.