Lennox furnace error code 105

Lennox furnace error code 105 is not a common error. It usually appears when there is a power-related problem. On the other hand, Lennox furnace error code 105 may happen when the air leak sensor detects that the furnace has been running with high airflow.

In this section, I will discuss how to fix Lennox furnace error code 105 in three ways: replacing the sensor and blower, resetting the circuit breaker, and resetting the thermostat.

Lennox furnaces are designed with a 3-digit error code on the control board. These codes help the technician identify what kind of fault has occurred in the furnace.

Lennox furnaces are designed with a 3-digit error code on the control board. These codes help the technician identify what kind of fault has occurred in the furnace. The Lennox company has defined 105 as an “Intermittent short cycling.” This means that some kind of intermittent problem is causing your furnace to cycle off and on more frequently than normal operation.

The Lennox error code 105 will mean that the blower motor is defective. There are a few different factors that can cause this problem.

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