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Lennox furnace error code cal

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Lennox furnace error code cal

If you’re experiencing an error code “cal” on your Lennox furnace, it usually means the unit has reached its maximum number of ignition attempts without successfully lighting the burners. This can be caused by various issues, such as a dirty or clogged air filter, a malfunctioning pressure switch, or a faulty ignition control module.
 
To troubleshoot the issue, start by checking the air filter and replacing it if it’s dirty. Next, inspect the pressure switch and make sure it’s functioning properly. If these steps don’t resolve the issue, you may need to call a professional HVAC technician to diagnose and repair the problem.
 
It’s important to address furnace issues promptly to ensure the safety and efficiency of your heating system. Regular maintenance and inspections can also help prevent future problems and extend the lifespan of your furnace.