What does Lennox code 201 mean?
Lennox furnace code 201 means the furnace cannot communicate with the indoor blower motor on the supported control family. Confirm the model number and diagnostic chart inside the furnace door before replacing parts.
What causes Lennox code 201?
- Loss of power or communication to the blower motor
- A failed ECM motor module
- Damaged motor wiring or an incorrect control configuration
Can I troubleshoot Lennox code 201?
- Turn furnace power off and replace a visibly dirty filter.
- Restore power once and listen for the indoor blower; do not reach into the blower compartment.
How much does Lennox code 201 cost to fix?
A blower motor replacement typically costs between $350 and $1,400 nationally.
When should I call a technician?
Call a technician if the blower does not run or the communication fault returns.
Sources and model scope
Fault codes vary by model and control board. Confirm the diagnostic chart inside your furnace panel or the official manual before acting.
Scope used here: Lennox integrated controls covered by installation instructions 508001-02D.
- Lennox Industries: Installation Instructions — Integrated Control Diagnostic Codes
508001-02D · Lennox furnaces explicitly covered by installation instructions 508001-02D; not a universal Lennox code list.
Compiled by Warmlo Editorial · Reviewed August 2026
This is general information, not professional advice. Gas, electrical, and combustion repairs can be dangerous — when in doubt, call a licensed technician.