Bosch BOVA-36HDN1-M20G Error Codes

Updated October 15, 2026 · by Aurora Star Tech Inc.

Bosch BOVA-36HDN1-M20G error codes and diagnostic codes (also listed as BOVA36HDN1M20G, 8733952437). The BOVA-36HDN1-M20G is a Bosch heat pump in the Bosch IDS 2.0 series.

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Bosch BOVA-36HDN1-M20G error codes list

Code	Meaning	Severity
A	Oil return in progress	Low
dF	Defrost in progress	Low
Force button	Force button - forced cooling/heating (charge mode)	Low
Force button 6 s	Force button held 6 seconds - manual defrost test	Low
Force mode display	Force (charge) mode running	Low

Troubleshooting the BOVA-36HDN1-M20G

Force cooling for charging with the FORCE button Bosch · Heat Pump
Start a manual defrost test (hold FORCE 6 s) Bosch · Heat Pump

All Bosch Heat Pump error codes →

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

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.

Bosch BOVA-36HDN1-M20G error codes list

Troubleshooting the BOVA-36HDN1-M20G

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