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Goodman Error Code b0: Indoor blower not running when it should be (Heat Pump)

Updated · by Aurora Star Tech Inc.

Goodman error code b0 on a heat pump means: Indoor blower not running when it should be. It is also called Goodman diagnostic code b0.

High severityHeat PumpGoodman/Amana ComfortNet ASZC/GSZC/DSZC

Homeowner? What Goodman code b0 means for you

Call a technician Your heat pump is reporting: Indoor blower not running when it should be. The heat pump has locked out or cannot run properly. One reset is fine; if the code comes back, it needs a licensed technician to find the cause.

Safe things you can check yourself

  • Check the thermostat: right mode (Heat or Cool), set a few degrees past room temperature, and fresh batteries if it uses them.
  • Check both breakers and the outdoor disconnect box beside the outdoor unit; all should be ON.
  • Look at the air filter. If it is grey and clogged, replace it; a blocked filter causes many shutdowns.
  • In winter, keep snow and ice off and away from the outdoor unit. A short defrost cycle with steam is normal.
  • Try one reset: turn the power off for 30 seconds, then back on. If the code comes back, stop resetting and call a technician.

Call (647) 657-2977Book a service call

Licensed technicians serving Vaughan, Toronto and the GTA.

What does Goodman error code b0 mean?

The outdoor unit sees that the indoor circulator blower is off during a call that needs airflow, so the outdoor unit will not run.

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

Common causes of Goodman code b0

  • Indoor blower motor or motor wiring problem
  • Communication error between the indoor and outdoor units
  • Indoor control fault
Safety: Gas, electrical and refrigerant work must be done by a licensed technician. Turn off power and gas before servicing, never bypass a safety control, and always follow the manufacturer's manual for your exact model.

Goodman models that use code b0

Show all 24 models

ASZC160241ASZC160361ASZC160421ASZC160481ASZC160601ASZC180241ASZC180361ASZC180481ASZC180601DSZC160241DSZC160361DSZC160481DSZC160601DSZC180361DSZC180481DSZC180601GSZC160241GSZC160361GSZC160481GSZC160601GSZC180241GSZC180361GSZC180481GSZC180601

Other Goodman Heat Pump codes

CodeMeaning
06Open start circuit
07Open run circuit
08No line voltage
09Low 24 V control voltage
A2Outdoor air temperature sensor fault
A3Outdoor coil temperature sensor fault
b9Indoor airflow lower than requested
CoreSense 1Yellow 1 flash - long run time (low side)
CoreSense 2Pressure trip - yellow 2 flashes (red 2 = lockout)
CoreSense 3Short cycling / pressure switch cycling - yellow 3 (red 3 = lockout)
CoreSense 4Locked rotor - yellow 4 (red 4 = lockout)
CoreSense 5Moderate run trip - yellow 5 (red 5 = lockout)

All Goodman Heat Pump error codes →

Goodman code b0: homeowner questions

What does Goodman code b0 mean?

Indoor blower not running when it should be. The outdoor unit sees that the indoor circulator blower is off during a call that needs airflow, so the outdoor unit will not run.

Is it safe to keep using my heat pump with code b0?

It depends on the cause. The heat pump has locked out or cannot run properly. One reset is fine; if the code comes back, it needs a licensed technician to find the cause.

Can I reset Goodman code b0 myself?

You can try one reset (power off for 30 seconds, then on). If Goodman code b0 comes back, the cause is still there and a licensed technician should check it.

Who can fix Goodman code b0 near me?

Aurora Star Tech Inc. repairs Goodman heat pumps in Vaughan, Toronto and across the GTA. Call (647) 657-2977 or book a service call online.

Homeowner help: AC Running But Not Cooling: What to Check · Heat Pump Not Heating or Blowing Cold Air

Troubleshooting guides

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. Written in our own words as a summary; always check the original manual.

General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.

Emergency HVAC Service

647-657-2977