Lennox Error Code P5
Over phase current protection
Error Code Summary
| Brand | Lennox |
| Error Code | P5 |
| Meaning | Over phase current protection |
| Cause | Phase current exceeds safe limit |
| Recommended Action | Check power supply, compressor, and inverter board |
How to Fix Lennox Error P5
- 1
Power Cycle the Unit
Turn off the unit at the breaker, wait 5 minutes, then restore power. Some errors auto-clear after a restart.
- 2
Identify the Issue
Error P5 means: Over phase current protection. The most common cause is: Phase current exceeds safe limit.
- 3
Take Corrective Action
Check power supply, compressor, and inverter board
- 4
Test the System
After completing repairs, run the system and monitor for the error code. If it recurs, the issue may require professional diagnosis.
Safety Notice
Always disconnect power before performing any electrical work. If you're not a certified HVAC technician, contact a qualified professional for repairs involving refrigerant, electrical components, or compressor work.
Frequently Asked Questions
What does Lennox error code P5 mean?
Lennox error code P5 indicates: Over phase current protection. This is typically caused by: Phase current exceeds safe limit.
How do I fix Lennox error code P5?
To fix Lennox error code P5: Check power supply, compressor, and inverter board. If the error persists after these steps, contact a qualified HVAC technician.
Is Lennox error code P5 serious?
Error code P5 (Over phase current protection) should be addressed promptly to prevent further damage to your Lennox system. Always turn off the unit if you notice unusual sounds, smells, or continued malfunction.