HVACopediaGoodman heat pump error codes
44 codes with causes and test steps.
| Code | Meaning | Severity |
|---|---|---|
| 01 | Low side fault or low pressure switch trip | High |
| 02 | High side fault or high pressure switch trip | High |
| 03 | Short cycling | Medium |
| 04 | Locked rotor | Critical |
| 05 | Open circuit - compressor off over 4 hours | High |
| 06 | Open start circuit | Critical |
| 07 | Open run circuit | Critical |
| 08 | No line voltage | High |
| 09 | Low 24 V control voltage | Medium |
| A2 | Outdoor air temperature sensor fault | Medium |
| A3 | Outdoor coil temperature sensor fault | High |
| b0 | Indoor blower not running when it should be | High |
| b9 | Indoor airflow lower than requested | Medium |
| d0 | No shared data on the network | High |
| d1 | Invalid shared data on the network | High |
| d2 | System mismatch - indoor unit cannot supply required airflow | Medium |
| d3 | Configuration mismatch - shared data does not match hardware | High |
| d4 | Shared data from the loader rejected | High |
| E5 | Outdoor control low-voltage fuse open | High |
| H8 | High line voltage | High |
| L1 | Lockout - low pressure switch tripped 3 times | High |
| L2 | Lockout - high pressure switch tripped 3 times | High |
| L6 | Lockout - open start circuit detected 4 times | Critical |
| L7 | Lockout - open run circuit detected 4 times | Critical |
| L8 | Low line voltage | High |
| P0 | Compressor protector open | High |
| CoreSense 1 | Yellow 1 flash - long run time (low side) | Medium |
| CoreSense 2 | Pressure trip - yellow 2 flashes (red 2 = lockout) | High |
| CoreSense 3 | Short cycling / pressure switch cycling - yellow 3 (red 3 = lockout) | Medium |
| CoreSense 4 | Locked rotor - yellow 4 (red 4 = lockout) | Critical |
| CoreSense 5 | Moderate run trip - yellow 5 (red 5 = lockout) | High |
| CoreSense 9 | Red 9 flashes - PROT output overcurrent | High |
| CoreSense solid red | Solid red TRIP - call present but compressor not running | High |
| EE | Outdoor control fault - compressor relay contacts welded | High |
| Yellow 1 flash | Low side fault / low pressure trip / low pressure lockout (older ComfortNet board) | High |
| Yellow 2 flashes | High side fault / high pressure trip / high pressure lockout (older ComfortNet board) | High |
| Yellow 3 flashes | Short cycling (older ComfortNet board) | Medium |
| Yellow 4 flashes | Locked rotor (older ComfortNet board) | Critical |
| Yellow 5 flashes | Open circuit (older ComfortNet board) | High |
| Yellow 6 flashes | Open start circuit / lockout (older ComfortNet board) | Critical |
| Yellow 7 flashes | Open run circuit / lockout (older ComfortNet board) | Critical |
| Yellow 8 flashes | Low or high line voltage (older ComfortNet board) | High |
| Yellow 9 flashes | Low 24 V control voltage (older ComfortNet board) | Medium |
| Yellow ON + Red ON | Compressor protector open (older ComfortNet board) | High |
Models covered
ALZS4BA**10AAALZS4NA**10AAALZS5BA**10AAANZ130181ANZ130241ANZ130301ANZ130361ANZ130421ANZ130481ANZ130601ANZ140181ANZ140241ANZ140301ANZ140361ANZ140421ANZ140481ANZ140491ANZ140601ASZ130181ASZ130241ASZ130301ASZ130361ASZ130421ASZ130481ASZ130601ASZ140181ASZ140241ASZ140301ASZ140361ASZ140381ASZ140421ASZ140481ASZ140491ASZ140601ASZ160181ASZ160241ASZ160301ASZ160361ASZ160421ASZ160481ASZ160601ASZ180361ASZ180481ASZ180601ASZC160241ASZC160361ASZC160421ASZC160481ASZC160601ASZC180241ASZC180361ASZC180481ASZC180601ASZH5***10DSZ160241DSZ160361DSZ160481DSZ160601DSZ180361DSZ180481DSZ180601DSZC160241DSZC160361DSZC160481DSZC160601DSZC180361DSZC180481DSZC180601GLZS4BA**10AAGLZS4MA**10AAGLZS5BA**10AAGSZ110903GSZ110904GSZ111203GSZ111204GSZ130181GSZ130191GSZ130241GSZ130251GSZ130301GSZ130311GSZ130361GSZ130363GSZ130371GSZ130421GSZ130481GSZ130483GSZ130484GSZ130601GSZ140181GSZ140241GSZ140301GSZ140361GSZ140371GSZ140421GSZ140481GSZ140491GSZ140601GSZ160181GSZ160241GSZ160301GSZ160361GSZ160421GSZ160481GSZ160601GSZC160241GSZC160361GSZC160481GSZC160601GSZC180241GSZC180361GSZC180481GSZC180601GSZH5***10SSZ140181SSZ140191SSZ140241SSZ140251SSZ140301SSZ140311
For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.