LED Fault Codes Descriptions and Solutions
Each brand has different LED fault codes, but the fault descriptions remains more or less the same. To use this descriptions and solutions, please refer to your unit's fault code descriptions.
No previous code: the previous code record was erased.
you just need to turn heating on and let unit run for awhile , then the new code will appear.
Blower on after power up:
Blower will be on for 90 seconds, then new code will appear.
Limit switch open main limit or roll-out control. Rollout switch opens, Main limit switch has opened
Open High Limit Switch. Limit circuit fault. Open temperature limit circuit. Limit circuit lock out
Ignition failure. Lockout Due to Excessive Retries. Ignitor Fault or Improper Grounding. Lockout Due to Excessive Retries, System lockout (retries or recycles exceeded)
Flame sensed with no call for heat, Ignition lockout, the flame is lost 5 times (4 recycles) during the heating cycle
Gas Heating lock out
Unexpected Flame. Flame Detected When No Flame Should Be Present. Flame sensed when no flame should be present. Flame was sensed when there was not a call for heat. Abnormal flame proving signal
High Stage Pressure Switch Stuck Open. Pressure Switch Stuck Open. Draft pressure error , after the unit was operating, the pressure switch opened 4 times during the call for heat, faulty inducer, blocked vent pipe broken pressure switch hose or faulty pressure switch. Pressure switch didn’t open.
Secondary voltage fuse is open
Pressure switch stuck closed. Switch will not open . Pressure switch stuck open switch will not close when inducer is on. pressure switch contacts are stuck in the closed position, Pressure switch did not close or reopen
Open Hot Surface Igniter Circuit. Ignition failure, Ignition proving failure, the flame could not be established
Control circuitry lockout
Reversed 115 VAC Polarity . 115 volt AC power reversed. reversed line voltage polarity or grounding problem, incorrect 24V phasing. Line and Neutral reversed.
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