Lennox · Error codes
Lennox furnace error codes
Codes are grouped by the controller that displays them, because the same number can mean different things on different Lennox generations. Read the full model number on the rating plate before trusting any code page.
Search a code with your model
Coverage
Only codes verified from Lennox manuals are listed. Missing a code? Call 604-473-9690 with the model number and the code.