6 🟡 Repair Required
Lennox Error Code 6: Pressure Switch System Lockout
⚠️ Your Lennox HVAC system has a pressure switch system lockout, which means it's not running to prevent damage. Call a professional soon.
How to Fix Lennox Code 6
- Step 1: Check and replace your air filter if it's dirty
- Step 2: If the system still won't run, call a professional HVAC technician
What Does Lennox Error Code 6 Mean?
The Lennox 6 error code indicates that the system's pressure switch has detected an abnormal pressure condition, causing the system to shut down. This could be due to a clogged filter, a refrigerant leak, or a faulty pressure switch. It's important to address this issue promptly to prevent further damage to your HVAC system.
Common Causes of Lennox Code 6
- A clogged air filter restricting airflow
- A refrigerant leak causing low pressure
- A faulty pressure switch sending incorrect signals
Applicable Lennox Models
Need a Pro to Fix Lennox Code 6?
A licensed HVAC technician can diagnose and fix this issue quickly.
Find a Licensed Tech Near You →Replacement Parts for Lennox Furnace Code 6
Pressure Switch OEM: 42-0227-00