Lennox furnace error code 411
This is a diagnostic code that may be displayed or logged upon encountering an unrecoverable fault on the furnace.
A 411 error is generally the result of an error in programming on the user end or sometimes within the furnace control module. In either case, a malfunction with one of these items may result in a 311 being noted on a user’s favorite log device.
The heating not coming on might be a problem with the
thermostat. It might also be helpful to consult a Lennox furnace manual.
The heating not coming on could be due to a malfunctioning factor with the thermostat. You may want to contact a heating professional for confirmation and inquire about the Lennox model failed you have to improve its condition.
These error codes on Lennox furnaces refer to stalled condensers.
F404- Condenser not active
411- Condenser stalled
417- Air in condenser tubing
428- IAC malfunction (replace)
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