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Goodman · Air conditioner

08 No line voltage

High severity Goodman/Amana ComfortNet ASXC/GSXC/DSXC

What the control is telling you

The control sees line voltage below 185 VAC. The unit may look normal, or the compressor protector may be open with compressor and fan off. Clears once voltage rises above 185 VAC.

Applies to: Communicating 2-stage condensers and heat pumps with the PCBHR104 or PCBHR105 outdoor control (7-segment display): ASXC16/18, GSXC16/18, DSXC16/18, ASZC16/18, GSZC16/18, DSZC16/18

Likely causes

  • No or very low line voltage to the unit

Test and repair steps

  1. Warning: Kill power to the outdoor unit before touching wiring, the compressor terminals or the control.
  2. Check breakers, fuses and the disconnect.
  3. Verify the unit is fed with the voltage on the rating plate; measure at the contactor line side.
  4. Correct the supply problem or contact the utility.

Models that show this code

23 models in Goodman/Amana ComfortNet ASXC/GSXC/DSXC

ASXC160241ASXC160361ASXC160481ASXC160601ASXC180241ASXC180361ASXC180481ASXC180601DSXC160241DSXC160361DSXC160481DSXC160601DSXC180361DSXC180481DSXC180601GSXC160241GSXC160361GSXC160481GSXC160601GSXC180241GSXC180361GSXC180481GSXC180601

Other codes on the same units

  • 04 Locked rotor
  • 05 Open circuit - compressor off over 4 hours
  • 06 Open start circuit
  • 07 Open run circuit
  • 09 Low 24 V control voltage
  • b0 Indoor blower not running when it should be
  • b9 Indoor airflow lower than requested
  • d0 No shared data on the network

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Source: Goodman ComfortNet ASXC/GSXC/DSXC, ASZC/GSZC/DSZC, AVPTC/MBVC service manual, Unitary Diagnostic Codes PCBHR104 p.71-77 and PCBHR105 p.78-84. 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.