Lennox furnace error code cal
This article has been compiled to provide a list of Lennox furnace error codes and their meaning. The list is intended to be comprehensive and allow you to diagnose your heating system and resolve the issue if necessary.
The most common cause of this error code is that the furnace needs to be reset. Generally, the problem could be solved by pressing a button on the front panel and waiting for about half an hour. You might have to call a technician to fix the problem if this doesn’t work.
Here are some potential causes for the “cal” error code:
-Intermittent or misfiring flame sensor
-Damaged ignition module
-Fuel mix too rich or too lean