HVAC Error Code Lookup
Find your error code below. Each guide includes what the code means, DIY troubleshooting steps, estimated repair costs in Albuquerque, and top-rated contractors who can fix it.
Carrier Error Codes (24 codes)
Carrier Furnace
No previous call for heat
Blower motor running after power interruption
Limit circuit lockout
Ignition lockout
Gas heating lockout after retry
Abnormal flame sense
Pressure switch didn't open
Secondary voltage fuse blown
Pressure switch or blocked flue
Low flame sense signal
Limit circuit fault
Ignition proving failure
Blower motor fault
Inducer motor fault
Pressure switch calibration fault
Blower calibration fault
Control circuit lockout
Carrier Air Conditioner
Indoor/outdoor communication error
Zero crossing detection fault
Indoor fan speed out of control
Indoor temperature sensor open
Indoor temperature sensor short
Outdoor temperature sensor fault
Indoor unit EEPROM error
Trane Error Codes (15 codes)
Trane Furnace
Gas heating lockout after retries
Abnormal flame sense
Pressure switch not open
Pressure switch stuck
Limit circuit lockout
Ignition proving failure
Low speed blower fault
Inducer motor fault
Trane Air Conditioner
Lennox Error Codes (24 codes)
Lennox Furnace
Pressure switch failure
Limit circuit open
Ignition failure
Blower motor fault
Communication lost
Invalid model selection
Low flame sense
Gas valve relay stuck
System lockout
Pressure switch fault
Open high temperature limit
Rollout limit open
Ignition lockout
Gas valve fault
Check polarity or grounding
Line voltage polarity reversed
Lennox Air Conditioner
Indoor blower fault
Low pressure switch
Gas valve relay error
High discharge temperature
Low suction pressure
High suction pressure
EEV failure
Compressor protection activated
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