Bosch · Heat pump

H01 Drive chip communication fault

High severity Bosch IDS LightBosch IDS Premium Connected

What the control is telling you

The outdoor board cannot talk to its drive chip.

Applies to: Bosch IDS Light BOVA15-24/36/60 and IDS Premium Connected BOVA36-20/60-20 R-454B heat pump outdoor units

Likely causes

Outdoor control board failure

Test and repair steps

Replace the outdoor unit control board and restart.

Models that show this code

5 models in Bosch IDS Light, Bosch IDS Premium Connected

BOVA15-24BOVA15-36BOVA15-60BOVA36-20BOVA60-20

Other codes on the same units

F2 System lockout (5 low-pressure trips in 100 minutes)
F4 Pressure transducer fault
F41 High pressure sensor fault
F42 Low pressure sensor fault
J00-JCF Compressor driver fault
n00-nCF Outdoor fan motor driver fault
o37 Low refrigerant in heating
P0 Control board / compressor IPM overheating

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Source: Bosch IDS Light installation BTC 762003308 D (02.2025), Fault Code Table 23 and 17.12 Error Code Troubleshooting, p.42-59; Bosch IDS Premium Connected installation BTC 762003301 D (02.2025), Fault Code Table 22 and 18.12 Error Code Troubleshooting. 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.