Model reference
Lennox EL280UH090P36B
Furnace
1 document20 error codes2 service modes
Available documentation
Service Manual
- Service Literature EL280UH(X)36 pg
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Error codes (20)
CodeMeaning
1+2Low flame current during run mode.1+3Flame sensed out of sequence -- flame still present.2+3Low pressure switch failed open.2+4Low pressure switch failed closed (bypassed).2+5High pressure switch failed open.2+6High pressure switch failed closed.2+7Low pressure switch opened during ignition trial or heating demand.3+1Limit switch open.4+1Watchguard -- Exceeded maximum number of retries.4+2Watchguard -- Exceeded maximum number of retries or last retry was due to…4+3Watchguard -- Exceeded maximum number of retries or last retry was due to flame…4+5Watchguard -- Limit remained open longer than three minutes.4+6Watchguard -- Flame sensed out of sequence; flame signal gone.4+7Ignitor circuit fault -- Failed ignitor or triggering circuitry.4+8Low line voltage.5+1Hard lockout -- Rollout circuit open or previously opened.5+2Control failed self check, internal error (control will restart if error…5+3No Earth ground (control will restart if error recovers).5+4Reversed line voltage polarity (control will restart if the error recovers).5+6Low secondary (24VAC) voltage.Service modes (2)
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