Lennox ML297UH045XV36BK Error Codes

Gas furnace · Ducted Heating

Model numbers in this family: ML297UH045XV36BK, ML297UH070XV36BK, ML297UH090XV36CK, ML297UH090XV60CK, ML297UH110XV60CK, ML297UH135XV60DK, ML297UHVK

• . Idle mode (Decimal blinks at 1 Hertz -- 0.5 second ON, 0.5 second OFF).
• A Continuous Fan Mode Only
• C Cooling stage (1 second ON, 0.5 second OFF) / 1 or 2 displayed / Pause / cfm setting…
• E000 No error in memory
• E110 Low line voltage.
• E111 Low line voltage.
• E112 Ground not detected.
• E113 High line voltage.
• E117 Poor ground detected (Warning only).
• E125 Control failed self-check, internal error, failed hardware. Will restart if error…
• E150 A2L Refrigerant leak alarm
• E151 Refrigerant Leak Detector Sensor #1 fault
• E152 Refrigerant Leak Detector #2 Fault
• E154 Refrigerant Leak Detector #1 Communication lost or invalid sensor dip switch…
• E155 Refrigerant Leak Detector #2 Communication lost
• E160 Refrigerant Leak Detector Sensor #1 type incorrect
• E161 Refrigerant Leak Detector Sensor #2 type incorrect
• E163 Furnace Control Board Failure
• E164 Low GWP Test
• E200 Hard lockout - Rollout circuit open or previously open.
• E204 Gas valve mis-wired.
• E205 Gas valve control relay contact shorted.
• E207 Hot surface ignitor sensed open.
• E223 Low pressure switch failed open.
• E224 Low pressure switch failed closed.
• E225 High pressure switch failed open.
• E226 High pressure switch failed closed
• E227 Pressure switch open during trial for ignition or run mode.
• E229 Ignition on high fire
• E240 Low flame current - Run mode.
• E241 Flame sensed out of sequence - Flame still present.
• E250 Limit switch circuit open.
• E270 Soft lockout - Exceeded maximum number of retries. No flame current sensed.
• E271 Soft lockout - Exceeded maximum number of retries. Last retry failed due to the pressure…
• E272 Soft lockout - Exceeded maximum number of recycles. Last recycle due to the pressure…
• E273 Soft lockout - Exceeded maximum number of recycles. Last recycle due to flame failure.
• E274 Soft lockout - Exceeded maximum number of recycles. Last recycle failed due to the limit…
• E275 Soft lockout - Flame sensed out of sequence. Flame signal is gone.
• E292 Indoor blower motor unable to start due to obstructed wheel, seized bearings.
• E311 Heat rate reduced to match indoor blower air flow.
• E390 Low GWP Relay Stuck
• H Gas Heat Stage (1 second ON, 0.5 second OFF) / 1 or 2 displayed / Pause / cfm setting…
• d Dehumidification mode (1 second ON) / 1 second OFF) / cfm setting displayed / Pause /…
• dF Defrost mode.
• h Heat pump stage (1 second ON, 0.5 second OFF) / % of input rate displayed / Pause / cfm…

Reference only. Confirm against the manual for your exact model. Data release 105f66ecb9e96e5dc473025d.