Gree Error Code b6: Accumulator inlet sensor open or shorted (20K) (Heat Pump)
Gree error code b6 on a heat pump means: Accumulator inlet sensor open or shorted (20K). It is also called Gree diagnostic code b6.
Homeowner? What Gree code b6 means for you
Check, then call Your heat pump is reporting: Accumulator inlet sensor open or shorted (20K). This is often caused by something simple. Try the safe checks below; if the code returns, book a service call before it turns into a no-heat or no-hot-water emergency.
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 Gree error code b6 mean?
The accumulator inlet thermistor (20K, RT1, CN422) reads open or shorted.
Applies to: Gree GMV6 Ultra Heat Mini VRF 36-60k (GMV-V..WL/C-T(U))
Common causes of Gree code b6
- Sensor or plug fault
- Wire damage
- Board fault
Gree models that use code b6
GMV-V36WL/C-T(U)GMV-V48WL/C-T(U)GMV-V60WL/C-T(U)
Other Gree Heat Pump codes
All Gree Heat Pump error codes →
Gree code b6: homeowner questions
What does Gree code b6 mean?
Accumulator inlet sensor open or shorted (20K). The accumulator inlet thermistor (20K, RT1, CN422) reads open or shorted.
Is it safe to keep using my heat pump with code b6?
It depends on the cause. This is often caused by something simple. Try the safe checks below; if the code returns, book a service call before it turns into a no-heat or no-hot-water emergency.
Can I reset Gree code b6 myself?
You can try one reset (power off for 30 seconds, then on). If Gree code b6 comes back, the cause is still there and a licensed technician should check it.
Who can fix Gree code b6 near me?
Aurora Star Tech Inc. repairs Gree 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
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- Louver will not swing - Gree ductless Gree · Heat Pump
- Noise or vibration - Gree ductless Gree · Heat Pump
- Outdoor fan will not run - Gree ductless Gree · Heat Pump
- Unit will not start - Gree ductless Gree · Heat Pump
- Water leaking from indoor unit - Gree ductless Gree · Heat Pump
- Weak cooling or heating - Gree ductless Gree · Heat Pump
Source: Gree GMV6 Ultra Heat Mini VRF 36-60k (GMV-V36-48-60WL-C-T(U)) service.pdf - section Chapter 3 Faults, 4.1 Error Indication. 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.