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Lennox error code 413

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Lennox error code 413

If you see the Lennox error code 413 on your HVAC system, the pressure switch is open when it should be. Various issues, such as a blocked vent or a malfunctioning pressure switch, can cause this.
 
To troubleshoot this issue, check that the vent and air intake are clear of obstructions. If they are, you may need to replace the pressure switch. It’s important to note that attempting to fix this issue yourself can be dangerous and may cause further damage to your system.
 
If you’re uncomfortable troubleshooting the issue alone, it’s best to call a licensed HVAC technician to diagnose and repair it. They have the tools and expertise to safely and effectively fix the issue and get your system back up and running.
 
Remember, regular maintenance and inspections of your HVAC system can help prevent issues like this from occurring in the first place.