Lennox | Numeric Codes (E-Codes)

Error Code E225

Troubleshooting guide for the Lennox Numeric Codes (E-Codes) system fault E225.

Disclaimer: This information is for general reference. Error codes can vary by model and production year. Always refer to your machine's specific manual and the information printed on the unit itself.

System Diagnosis

High Pressure Switch Open. The high pressure switch is open (Cooling/Heat Pump).

Potential Causes & Solutions

  • Dirty outdoor coil, bad fan motor, overcharged system.

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