¿Qué provoca el error E3 de Lennox?

Indoor fan motor malfunction. Problem with the fan speed control circuit. Obstruction preventing fan rotation

¿Cómo se corrige el código de falla E3 de Lennox?

1. Check that the indoor unit's air intake and outlet vents are clear of obstructions. 2. Listen to confirm if the indoor fan is running when the unit is powered on. 3. Verify there are no physical obstructions preventing the fan from spinning. 4. Contact a technician if the fan motor or its control board appears to be faulty.

E3 — Indoor fan speed error (MMDB Indoor Units)

Lennox · Air Conditioning

¿Qué significa E3 ?

For MMDB indoor units: This error indicates an issue with the indoor fan's speed regulation. The fan might be operating at an incorrect speed or not at all.

Causas comunes

Indoor fan motor malfunction
Problem with the fan speed control circuit
Obstruction preventing fan rotation

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

1
Check that the indoor unit's air intake and outlet vents are clear of obstructions.
2
Listen to confirm if the indoor fan is running when the unit is powered on.
3
Verify there are no physical obstructions preventing the fan from spinning.
4
Contact a technician if the fan motor or its control board appears to be faulty.

Ver todos los códigos en este manual (57)

Datos técnicos verificados. Última actualización: April 2026

Fallas relacionadas

E0E0 — Indoor unit EEPROM error (MMDB Indoor Units)E1E1 — Communication error between indoor and outdoor units (MMDB Indoor Units)E4E4 — Indoor return air temperature sensor error

Fuente: Lennox Air Conditioning

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