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Bosch BOVA36-20 Error Codes

Updated · by Aurora Star Tech Inc.

Bosch BOVA36-20 error codes and diagnostic codes (also listed as BOVA3620). The BOVA36-20 is a Bosch heat pump in the Bosch IDS Premium Connected series.

Homeowner with a heat pump problem? Call (647) 657-2977 or book a service call — licensed technicians across Vaughan and the GTA.

Bosch BOVA36-20 error codes list

CodeMeaningSeverity
AtLAmbient temperature limitedLow
b2Indoor T2 sensor faultMedium
b3Indoor refrigerant sensor hardware faultMedium
b4Indoor refrigerant sensor communication faultMedium
b5Indoor to outdoor communication faultHigh
b7R-454B refrigerant leak protectionCritical
b8Refrigerant sensor past service lifeLow
C3T3 coil sensor not reading correctly in coolingMedium
E7T5 discharge sensor not reading correctlyMedium
E41T3 temperature sensor faultMedium
E42T3L temperature sensor faultMedium
E43T4 temperature sensor faultMedium
E44T5 temperature sensor faultMedium
E45Th temperature sensor faultMedium
E51Input voltage out of rangeHigh
E52DC bus voltage out of rangeHigh
E81EEV coil faultMedium
EAControl and drive program mismatchMedium
F1High pressure switch protectionHigh
F2System lockout (5 low-pressure trips in 100 minutes)High
F41High pressure sensor faultMedium
F42Low pressure sensor faultMedium
H01Drive chip communication faultHigh
J00-JCFCompressor driver faultHigh
n00-nCFOutdoor fan motor driver faultMedium
P0Control board / compressor IPM overheatingHigh
P1High pressure protectionHigh
P4High compressor discharge temperatureHigh
P5Condenser coil temperature protection (cooling)High
P11High pressure protection (transducer)High
P21Low pressure protectionHigh
P31Input over-current protectionHigh
P32Compressor over-current protectionHigh
PHLow discharge superheat protectionHigh

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.

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