HVACopediaGoodman · Heat pump
Yellow 5 flashes Open circuit (older ComfortNet board)
What the control is telling you
Yellow LED 5 flashes: compressor and fan off over 4 hours with pressure switches closed. Same as code 05 on newer boards.
Applies to: Earlier ComfortNet condensers/heat pumps with the PCBHR101-103 or PBBGR101-102 outdoor control (green, yellow and red status LEDs) - ASXC/DSXC/ASZC/DSZC revisions before the PCBHR104 change
Likely causes
- Power off at breaker/fuse/disconnect
- Compressor protector failed open
- Compressor wiring to control wrong or broken
Test and repair steps
- Warning: Kill power to the outdoor unit before touching wiring, the compressor terminals or the control.
- Check breakers, fuses and disconnect.
- Check compressor wiring and windings.
- Clears after one normal cycle.
Models that show this code
24 models in Goodman/Amana ComfortNet ASZC/GSZC/DSZC
Other codes on the same units
- Yellow 1 flash Low side fault / low pressure trip / low pressure lockout (older ComfortNet board)
- Yellow 2 flashes High side fault / high pressure trip / high pressure lockout (older ComfortNet board)
- Yellow 3 flashes Short cycling (older ComfortNet board)
- Yellow 4 flashes Locked rotor (older ComfortNet board)
- Yellow 6 flashes Open start circuit / lockout (older ComfortNet board)
- Yellow 7 flashes Open run circuit / lockout (older ComfortNet board)
- Yellow 8 flashes Low or high line voltage (older ComfortNet board)
- Yellow 9 flashes Low 24 V control voltage (older ComfortNet board)
Save it for the next call
Star this code in the HVACopedia app and keep the whole library on your phone for jobs with no signal.
Source: Goodman ComfortNet ASXC/GSXC/DSXC, ASZC/GSZC/DSZC, AVPTC/MBVC service manual, diagnostic/status LED table (PCBHR101-103, PBBGR101-102) p.65-69. Summarized in our own words; check the original manual for your model.
Homeowner looking at this code? See what it means for you and when to call a technician.
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.