System Diagnosis
Hard Lockout - Rollout Switch Open. The flame rollout switch has detected flames outside the heat exchanger.
Lennox | Numeric Codes (E-Codes)
Error Code E200
Troubleshooting guide for the Lennox Numeric Codes (E-Codes) system fault E200.
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
- Blocked flue, cracked heat exchanger, bad draft.
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