Lennox error codes
Lennox furnaces and air conditioners show fault codes on the control board or thermostat. Find what each code means and when to call an HVAC technician.
Furnace codes 16 codes
Before you start
Write down the exact code on the display, including any letters. Many codes clear after a power reset: unplug the appliance for 2–3 minutes, plug it back in, and run a short cycle. If the code comes back, open its page below and work through the fixes in order.
Other brands
Samsung
Samsung washers, dryers, dishwashers and refrigerators show short codes like 4E or 5E when something needs attention.
LG
LG washers and dryers use two-letter codes such as OE, UE and LE to report problems.
Whirlpool
Whirlpool washers display F-and-E fault codes like F8 E1 when a cycle cannot complete.
Bosch
Bosch washers, dryers, dishwashers, refrigerators and ovens show codes like E15 or E09 when a cycle cannot complete.
GE
GE washers, dryers, dishwashers, refrigerators and ovens use codes to flag problems mid-cycle.
Frigidaire
Frigidaire appliances display SY, EF and similar codes when something needs attention.
Maytag
Maytag washers, dryers, dishwashers, refrigerators and ovens show fault codes when a cycle fails.
Kenmore
Kenmore washers, dryers, dishwashers, refrigerators and ovens — including Kenmore Elite models — show error codes when a cycle cannot finish.
Goodman
Goodman furnaces and air conditioners flash red and green LED codes when something goes wrong.