Lennox Air Conditioner Error Code 2

Flash code 2 on a Lennox air conditioner is an input indication, not a fault or error. It means the control board has detected and acknowledged a configuration change, such as a jumper setting adjustment, a delay override, or the addition of an optional safety device. No repairs or parts are needed in response to this code.

Flash code 2 does not indicate a safety issue. It is an acknowledgment signal from the control board and does not represent a failure of any component. Your system should be operating safely and normally when this code is displayed.

Flash code 2 does not require any repair, so there is no associated repair cost. It is a normal informational code that confirms the board registered a configuration change. If a technician is investigating this code as part of a service call, the cost would only reflect the standard diagnostic visit fee, typically in the range of $75 to $150 depending on your location and provider.

No action is required. Flash code 2 is purely informational and confirms the control board has recognized a change in its configuration or inputs. If you recently had service performed or a new accessory installed, this code is expected and normal.

Resetting the control board may clear the flash code 2 display, but the code is not a persistent fault that requires clearing. Since it is an informational acknowledgment rather than an error, it does not need to be reset. If it appears again after a reset, it simply means the board is again detecting a configuration input.