Lennox Furnace Error Codes
Complete list of Lennox furnace error codes with causes and how to fix them.
225
🔴
Lennox Furnace error code 225: Low gas pressure.
Technician Required
226
🔴
Lennox Furnace error code 226: High gas pressure.
Technician Required
227
🔴
Lennox Furnace error code 227: Ignition lockout.
Technician Required
232
🔴
Lennox Furnace error code 232: Flame sensor failure.
Technician Required
241
🟡
Lennox Furnace error code 241: Draft pressure switch failed open.
Technician Required
242
🟡
Lennox Furnace error code 242: Draft pressure switch failed closed.
Technician Required
245
🔴
Lennox Furnace error code 245: Rollout switch open.
Technician Required
260
🟡
Lennox Furnace error code 260: Inducer motor fault.
Technician Required
280
🟡
Lennox Furnace error code 280: Communication error.
Technician Required
285
🟢
Lennox Furnace error code 285: Indoor blower motor fault.
✓ DIY Possible
E1
🔴
Lennox Furnace error code E1: High pressure switch lockout.
Technician Required
E2
🔴
Lennox Furnace error code E2: Low pressure switch lockout.
Technician Required
E3
🔴
Lennox Furnace error code E3: Loss of charge (refrigerant).
Technician Required
E4
🟢
Lennox Furnace error code E4: Outdoor temperature sensor failure.
✓ DIY Possible
E5
🟢
Lennox Furnace error code E5: Discharge temperature sensor failure.
✓ DIY Possible
E6
🟢
Lennox Furnace error code E6: Suction temperature sensor failure.
✓ DIY Possible
E7
🟢
Lennox Furnace error code E7: Liquid temperature sensor failure.
✓ DIY Possible
E8
🟢
Lennox Furnace error code E8: Indoor coil temperature sensor failure.
✓ DIY Possible
E9
🟡
Lennox Furnace error code E9: High discharge temperature protection.
Technician Required