System Diagnosis
Low Flame Signal. The flame sensor current is weak.
Lennox | LED Status Codes (DS1 & DS2)
Error Code Slow Flash / Fast Flash
Troubleshooting guide for the Lennox LED Status Codes (DS1 & DS2) system fault Slow Flash / Fast Flash.
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.
Potential Causes & Solutions
- Dirty flame sensor, poor ground, bad wire connection.
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