Model reference
Lennox HM30-1
HVAC
1 document10 error codes
Available documentation
Service Manual
- CompleteHeat System Service Literature44 pg
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Error codes (10)
CodeMeaning
AM30 LED Continuous OnAM30 blower/pump control board errorAM30 LED Continuous On or OffAM30 blower/pump control board failure.AM30 LED FlashingNormal operation of the AM30 blower/pump control board.DIAG1 Continuous On/Off, DIAG2 Continuous On/OffTDSI control board failure.DIAG1 Flash Alternate, DIAG2 Flash AlternateFlame failure detected (LED pattern exists during postpurge prior to…DIAG1 Flash, DIAG2 OffThermistor failure detected (LED pattern exists during postpurge prior to…DIAG1 Flash, DIAG2 OnLimit switch open condition detected (LED pattern exists during postpurge prior…DIAG1 Off, DIAG2 FlashAbnormal pressure switch operation detected (pattern exists during prepurge and…DIAG1 On, DIAG2 FlashWatchguard modeDIAG1+DIAG2 Flash TogetherNormal operation of the TDSI control board; no fault present.Related Lennox hvac models
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