Lennox Furnace Error Codes & Fix Guides
All FixCode Guide coverage for Lennox furnace error codes: start with the complete code list, or jump to a deep-dive guide for a specific code. Everything is verified against Lennox manufacturer documentation.
Guides in this section
Lennox Furnace Error Codes List: Every Code ExplainedLennox Furnace 201 Error Code: Meaning, Causes & Fix
Most searched Lennox furnace codes
| Code | Meaning |
|---|---|
| E201 | Indoor blower communication failure — Lennox's alert-code definition of E201: the system has lost communication with the indoor blower motor. Lennox lists power outage and brown-out among the causes, notes the problem may be on the control or the motor side, and states the alert clears itself once communication is restored. |